SHIP SPECIFICATIONS, EQUIPMENT, AND SUPPLIES
7. SHIP SPECIFICATIONS.
=a. General external characteristics.= An engineer port repair ship
is similar in external appearance to the average sea-going commercial
cargo carrier. Two ready means of identification are the cathead on the
ship’s prow and the number and arrangement of the cargo booms. These
features are discussed in detail in paragraph 10. (See figs. 4 and 5.)
The ship’s superstructure begins at the mainmast and continues aft to
the stern. Forward of the superstructure are the two masts, the three
hatches, and the forecastle deck.
=b. Principal dimensions and capacities.=
(1) For principal dimensions and capacities see table I and figure 6.
(2) For location and capacities of fuel-oil, fresh-water, and
salt-water tanks, see table II and figure 7.
[Illustration: _Figure 4. Cathead welded on ship’s prow._]
[Illustration: _Figure 5. View looking aft from forecastle deck showing
masts and cargo booms._]
_Table I. Principal dimensions of engineer port repair ship_
====================================================
Principal Dimensions
----------------------------------------------------
Length over-all 291 feet, 1 inch.
Length between perpendiculars 255 feet, 0 inches.
Breadth, molded 42 feet, 6 inches.
Depth, molded 25 feet, 3 inches.
Gross tonnage 2,483.70
Net tonnage[3] 1,577.15
----------------------------------------------------
Weights and Volumes Used
----------------------------------------------------
1 ton 2,240 pounds.
1 ton fresh water 36 cubic feet.
1 ton salt water 35 cubic feet.
1 ton Diesel oil 41.98 cubic feet.
----------------------------------------------------
[3] Net tonnage is gross tonnage less deductions for space occupied
by main engines, crew’s quarters, etc. It indicates approximate cargo
capacity of the ship.
_Table II. Capacities of Diesel-oil, fresh-water, and salt-water tanks_
=================================================================
Capacities of Tanks
----------------------------+--------+-----+---------------------
| | | Tons
Compartments | Frames |Cubic+------+--------+-----
| |feet |Diesel| Fresh |Salt
| | | oil | water |water
----------------------------+--------+-----+------+--------+-----
Double-bottomed tank No 1, | | | | |
P[4] | 79-106 |2,798| 66.6 | |
Double-bottomed tank No 1, | | | | |
S[4] | 79-106 |2,752| 65.6 | |
Double-bottomed tank No 2, | | | | |
P and S | 57-71 |4,288|102.2 | |
Double-bottomed tank No 3, | | | | |
P and S | 23-51 |5,760|137.2 | |
Deep-wing tank No 4, P and S| 9-23 |5,635|134.2 | |
Forepeak tank, single |115-stem|4,500| | 126.4 |
Deep tank No 1, P and S |115-115 |5,405| | 150.1 |
Deep tank No 2, P and S |107-11 |7,296| | 202.7 |
Deep-wing tank No 5, P and S| 2-8 | 900| | 25.0 |
Afterpeak tank, single | 2-stem|1,141| | 31.7 |
Forepeak tank, single |115-stem|4,550| | |130
Deep-wing tank No 3, P and S| 79-107 |6,276| | |179.4
| | +------+--------+-----
Total | | |505.8 |535.9[5]|309.4
----------------------------+--------+-----+------+--------+-----
[4] P stands for port; S, for starboard.
[5] 249,500 gallons.
=c. Displacement.=
(1) The dead-weight scale (fig. 10), shows the ship’s capacity
for carrying dead weight, the difference between light and loaded
displacement.
(2) Figure 10 also shows the ship’s load-line marks[6] and their
relation to the decks. These marks establish the safe load line for the
ship in different waters, allowing a measure of reserve buoyancy. Load
lines are established and assigned by the American Bureau of Shipping.
The center of the circle is located exactly amidships on the vessel’s
load waterline, and the horizontal line through the circle corresponds
to the summer load line. The letters _AB_, used where the horizontal
line cuts the circle, indicate the American Bureau of Shipping. The
letter _F_ to the left of the vertical line is the fresh-water marking,
and _S_ to the right of the vertical line is the salt-water marking.
[6] Sometimes called Plimsoll mark; Plimsoll mark indicates maximum
allowable draft.
=d. Power.= The ship is propelled by a high-power, low-speed Diesel
engine. Other engines may be substituted as required.
=e. Armament.= For AA protection, the ship carries six 20-mm AA machine
guns. Mounted on the after end of the poop deck is a Navy 3″/50 (3-inch
bore, 150 inches long) dual-purpose AA gun.
8. EQUIPMENT FOR SHIP OPERATION.
=a. General.= This paragraph describes briefly the major items of
equipment required for the operation of the ship.
=b. Navigation equipment.=
(1) _Compasses._
(_a_) The ship is equipped with magnetic and gyrocompasses. The master
gyrocompass is located below decks in the gyro-room. The readings
of this compass are transmitted to repeaters, which are similar in
appearance to magnetic compasses and are placed in the pilot house and
at other points where knowledge of the ship’s heading is required.
Gyrocompass equipment includes the master compass and its supports,
batteries, a motor-generator set for supplying power in case of failure
of the ship’s supply, instrument panel, and a panel for fuses and
switches for the repeaters.
(_b_) The magnetic compass is in the pilot house. It is mounted in
a compensating binnacle that neutralizes or compensates for errors
introduced into the compass by the magnetic materials on the ship. (See
figs. 8 and 9.)
(2) _Pelorus._ A pelorus is mounted on each wing of the navigating
bridge. The pelorus is a graduated circle mounted in gimbals with an
alidade pivoted over its center. It is used to measure directions to
some distant point like another ship or an object on land. It gives the
bearing relative to the ship’s heading or, if set to the ship’s true
course, the true bearing to the object.
[Illustration: INBOARD PROFILE
_Figure 6. Inboard profile of engineer port repair ship showing
location of main installations._]
[Illustration: INNER BOTTOM PLAN
_Figure 7. Inner-bottom plan showing location of Diesel-oil,
fresh-water, and salt-water tanks._]
[Illustration:
_1. Wheel._
_2. Compensating binnacle._
_3. Magnetic compass._
_4. Telephone._
_5. Speaking tube._
_6. Gyrocompass mounted on binnacle._
_7. Engine room control._
_Figure 8. View of pilot house._]
[Illustration: _Figure 9. Drawing of navigating bridge showing location
of equipment in pilot house, chart room and radio room._]
[Illustration: LIGHT SHIP WITH 418 TONS BALLAST—2204 TONS
_Figure 10. Dead-weight scale and load-line marks._]
(3) _Radio direction finder._ Located on the navigating bridge is the
ship’s radio direction finder. This instrument receives radio signals
and establishes the bearing of the sending station. It consists
essentially of a loop antenna for receiving the signals connected to a
radio receiver that makes the signals audible. The position of the ship
may be determined from radio bearings by taking cross bearings on two
or more stations, by two bearings on the same station and the distance
run between bearings, and by a bearing and a sounding.
(4) _Fathometer._
(_a_) A fathometer is installed on the navigating bridge to determine
the depth of water under the ship. This instrument works on the echo
depth-finding process. Briefly, it consists of a submarine oscillator
in the bottom of the ship that produces a sound of sufficient intensity
to travel to the ocean floor and reflect back to a sensitive receiver
also located in the ship’s bottom. The difference between the time of
sending the sound and receiving the echo is measured by the fathometer,
translated into depth, and flashed on the dial as a red light opposite
a numeral corresponding to the depth in fathoms.
(_b_) Near the fathometer is a fathometer recorder that records on
a paper chart the depths indicated by the fathometer. This gives a
continuous depth profile of the ocean bottom along the ship’s course.
(5) _Chartroom equipment._ In the chartroom are sextants, protractors,
dividers, parallel rules, chronometer, hydrographic charts, and a chart
table.
=c. Communications.=
(1) _Radio._ The radio equipment consists of a main receiver and
transmitter with emergency sets and a short-wave receiver and
transmitter. The radio sets presently used are shown in figures 9 and
11. The manuals describing this equipment are listed in ASF Catalog Sig
10-1.
(2) _Radio telephone._ Radio telephone communication is handled
by the short-wave transmitter and receiver. (See fig. 11.) They
operate on frequencies between 2 and 3 million cycles per second with
separate channels designated for specific purposes. For ship-to-shore
communication, frequencies range between 2,100 and 2,200 kilocycles.
Direct ship-to-ship communication is on 2,738 kilocycles. The sets thus
send and receive on different frequencies.
(3) _Visual signal equipment._
(_a_) _Flashing light signals._ Flashing light signals are made with a
dot-and-dash blinker light. The light is on top of the pilot house for
greater visibility and is mounted so it can be shone in any direction.
(_b_) _Flag signaling._ The ship carries complete sets of International
flags and pennants and hand flags for signaling by semaphore.
=d. Main engine.=
(1) The main engine is an 8-cylinder, supercharged 4-cycle Diesel
capable of developing 1,300 hp. (See fig. 12.)
(2) The engine has an air starting system; pressure lubrication for all
running parts except the pistons, which are lubricated by oil thrown
into the cylinder walls by the cranks; and an indirect cooling system
in which clean soft water is circulated in a closed circuit and cooled
by sea water in the heat exchangers. The fuel system uses a manifold
in which fuel is maintained at constant pressure but in which there is
no pressure on the injection valves except during the actual time of
injection.
=e. Auxiliary engines.= Diesel and gasoline auxiliary engines furnish
power for the ship’s generators, compressors, and pumps. Typical of the
auxiliary engine installations are the 120-hp Diesels used to drive the
fire pumps. (See fig. 13.)
=f. Electrical systems and generators.= Electricity for the ship’s
lighting system and for the electrically operated equipment are
furnished by Diesel or gasoline-driven generators. In case the main
generator fails, an emergency generator starts automatically. If all
generators should fail, batteries supply the power. (See fig. 14.)
=g. Lifeboats.= The ship carries two 26-foot power whaleboats, two
oar-propelled lifeboats, life rafts, and a number of small rubber
floats. (See figs. 1, 15 and 16.)
The two life rafts (figs. 1 and 16) are mounted on skids at an angle of
about 45°. Each skid has a releasing device that permits quick release
of the raft into the water or will let it float free if the ship sinks.
=h. Mooring and towing.=
(1) Installed on the main deck at the ship’s stern is a combination
towing machine and anchor windlass. It hoists and lowers the two
3,000-pound Danforth anchors.
When used for towing, it carries the towline on a reel and pays it out
and hauls it in automatically to keep towing tension constant.
(2) For handling the two bow anchors, a windlass is installed on the
forecastle deck. (See fig. 17.)
[Illustration:
_1. Mackay 156.4 short-wave transmitter._
_2. Federal 125AY emergency receiver._
_3. Scott SLR-7 main receiver._
_4. SCBC 779-A short-wave receiver._
_5. Federal 149-A emergency transmitter._
_6. Radiomarine ET 8010C main transmitter._
_Figure 11. Radio transmitting and receiving sets in radio room._]
[Illustration: _Figure 12. High-power, low-speed, supercharged Diesel
engine._]
[Illustration: _Figure 13. One of the 120-hp Diesels to run the ship’s
fire pumps._]
[Illustration: _Figure 14. View of generator room showing the three
electrical generators that can be run singly or in series and are
driven by three 90-hp 2-cycle Diesel engines._]
=i. Fire fighting.=
(1) The principal fire-fighting equipment consists of four motor-driven
pumps, each with a capacity of 3,000 gallons per minute (gpm) and
capable of 125 pounds pressure. (See fig. 13.) They are connected
to an 8-inch fire main arranged on a loop circuit around the main
deck. Spaced equally along this circuit are eight 2-1/2-inch
hydrants equipped with fog or spray nozzles. Throughout the ship are
twenty-eight 1-1/2-inch connections.
(2) There are two 1,000-gpm fire monitors. One is located forward on
the forecastle head and the other is abaft the stack. (See figs. 1, 18,
and 19.)
(3) A fixed carbon-dioxide smothering system is used in engine and
tank compartments, bilges, and galley. Hand-operated extinguishers are
located in all parts of the vessel.
=j. Crew’s quarters.=
(1) Quarters for most of the enlisted members of the crew are located
on the first platform deck. Also on this deck are the laundry room,
linen lockers, and the ship’s post exchange.
(2) On the main deck, the rest of the enlisted men and the Navy gun
crew are quartered. Also on this deck are the ship’s galley and pantry,
mess rooms (fig. 20), shower rooms, and diving-gear compartment.
(3) On the boat deck are officers’ quarters, the ship’s company office,
dispensary (fig. 21) and a four-bed hospital.
[Illustration: _Figure 15. View of two of the ship’s lifeboats swung
on two different types of davits. The davit A in the foreground is the
quadrantal davit and is rapidly replacing the round bar or radial davit
B, because fewer men are required to work it._]
(4) On the bridge deck are the staterooms and offices of the ship’s
master, salvage officer, chief engineer, and the naval gunnery officer.
=k. Refrigerators.= Located on the second platform deck are the fruit
and vegetable, meat, and dairy refrigerators. These refrigerators hold
a 30-day supply of perishable foods.
9. SUPPLIES FOR SHIP OPERATION.
=a. Diesel oil.= The Diesel oil tanks hold 506 tons of fuel. (See table
II.) Normal consumption is figured at one-half pound per 1 hp per hour.
There is enough oil for approximately a 60-day cruise.
=b. Fresh water.= The ship’s tanks hold 536 tons (249,500 gallons)
of fresh water. This supply is maintained by the evaporator which is
capable of supplying 3,000 gallons of fresh water every 24 hours.
=c. Food.= The ship usually carries enough food for a 30-day period.
Dry stores, such as canned goods, flour, sugar, etc., are stowed in
storage bins on the second platform deck.
=d. Linens.= The ship’s laundry facilities are adequate only for the
ship’s personnel. The linen lockers hold a 30-day supply of linens.
10. EQUIPMENT FOR PERFORMING MISSION.
=a. General.= This paragraph describes the more important items of this
equipment and tells how it is used. To perform its mission of starting
port repairs, the ship contains completely equipped machine, carpenter,
blacksmith, pipe, and welding shops in addition to a large assortment
of miscellaneous equipment for various jobs.
[Illustration: _Figure 16. One of the life rafts mounted on skids. Each
can accommodate 20 persons, and carries rations, water, and signaling
devices. (See FM 21-22.)_]
=b. Machine shop.= The machine shop is located below the number 2
hatch (fig. 6) and contains lathes, drills, milling machine, shaper,
punch and shear machine, cutters, and grinders. (See fig. 22.) All
this equipment has complete sets of accessories and tools. The I-beams
athwartship at number 2 hatch are removable, permitting portable
equipment to be hoisted from or lowered to the machine shop.
Here are brief descriptions of the more important items of the
machine-shop’s equipment.
(1) _The DOALL machine._ This machine (fig. 23) is used for contour
metal sawing, filing, and polishing. It is a highly adaptable machine
tool for jig work and for making dies. It does the work of a shaper
or milling machine and replaces such operations as nibbling, drilling
holes to make a cut, and torch cutting. Twenty assorted saws, 3/32
to 1/2 inches wide; three flat filebands, 1/4-inch, 3/8-inch, and
1/2-inch; and three file guides are standard equipment. The machine is
equipped with a 3/4-hp, 208-volt, 3-phase, 60-cycle motor.
(2) _Toolroom lathe._ The 10-inch toolroom lathe (fig. 24) has
a 4-1/2-foot bed and 1-inch collet capacity. It is driven by an
underneath, 3/4-hp, 3-phase, 60-cycle motor. It is equipped with
collet, milling and keyway-cutting, and telescopic-taper attachments,
boring and turning cutters, fine and coarse diamond knurls, tool
holders, and a large and small face plate.
(3) _Extension-bed gap lathe._
(_a_) This 20-by 40-inch gap lathe has a 14-foot bed and a special,
large face plate. With the gap closed, it is used as a regular engine
lathe. (See fig. 25.)
(_b_) The tools and accessories for the lathe include telescoping
taper attachment, boring and cutting bars, end caps, bits, chucks, and
centers. Also, there is a set of metric thread-cutting gears for use
where the metric system is standard. The lathe is driven by a 7-1/2 hp,
3-phase, 60-cycle motor.
(4) _Engine lathe._ The 16-by 54-inch engine lathe (fig. 26) also can
be equipped with special threads including metric, by using special
gearing in the endworks. It is driven by a 3-phase, 60-cycle, 208-volt
motor and is equipped with telescoping taper attachments, boring bars,
cutters, bits, chucks, tool holders, and metric thread-cutting gears.
[Illustration: _Figure 17. Windlass for handling bow anchors._]
(5) _Shaper._
(_a_) This 24-inch universal shaper is used for facing surfaces,
notching, keyseating, and the production of flat surfaces on small
parts. (See fig. 27.)
(_b_) The shaper is equipped with bits, holders, table, vise, and
wrench set, and is driven by a 208-volt, 3-phase, 60-cycle motor.
(6) _Radial drill._
(_a_) The radial drill has a 4-foot arm, 11-inch column, and 12 spindle
speeds. (See fig. 28.) It has a range of 15 to 1,200 rpm and is driven
by a 5-hp, 208-volt, 3-phase motor.
(_b_) The drilling capacity of this machine is approximately 2-inches
diameter in cast iron and 1-1/2-inches diameter in steel. Its tapping
capacity is a 2-inch tap in cast iron and 1-1/2-inch tap in steel.
(_c_) Its accessories include a coolant attachment, universal drill
table, drill vise, chuck, and taper shank.
(7) _Milling machine._ The milling machine is used for gear cutting and
jig and die work. The work is done with cutters instead of by sawing
as the DOALL machine does. It is equipped with a 208-volt, 3-phase,
60-phase motor and has slotting and milling attachments, chucks, vise,
arbors and adapters, and a complete set of cutters. (See fig. 29.)
(8) _Punch and shear machine._
(_a_) This combination punch and shear machine has a punch capacity
1-by 1/2-inch or 7/8-by 5/8-inch. Its shear capacity is 1/2-inch
plates, 6-by 5/8-inch flats, 1-5/8-inch rounds, and 1-1/2-inch squares.
(See fig. 30.)
(_b_) It is driven by a 3-hp, 3-phase, 60-cycle, 208-volt motor, and
its accessories include punches, dies, shear blades for plates and
flats, and bar-cutter blades for rounds, squares, angles, and tees.
[Illustration: _Figure 18. Fire monitor showing the power nozzle and
hose connections. The monitor rotates and the power nozzle tilts at any
desired degree._]
(9) _Drill._ This column-type drill (fig. 31) has a 1-inch capacity in
steel and is driven by a 2-hp, 3-phase, 60-cycle, 208-volt motor. Its
accessories include a Jacobs three-jaw ball-bearing chuck, reducing
sleeves, and a combination drill and countersink set.
[Illustration: _Figure 19. View showing the fire monitor in operation.
The water is being forced through the power nozzle at 100-pound
pressure._]
[Illustration: _Figure 20. View of enlisted men’s mess room. The tables
accommodate 32 men._]
(10) _Combination tool and cutter grinder._
(_a_) This grinder has a 10-inch-diameter swing and 24 inches between
head and footstock. It is driven by a 3/4-hp, 3-phase, 60-cycle,
208-volt motor and has attachments for all forms of milling cutters,
taps, and reamers. (See fig. 32.)
(_b_) For grinding, this machine is run by a 1/8-hp, 1-phase, 60-cycle,
110-volt motor, and has 3-inch to 8-inch wheels for dressing and
grinding.
(11) _Pedestal grinder._ This grinder for tool sharpening operates
at 1,750 rpm and is driven by a 3-phase, 208-volt, 60-cycle motor.
The grinding wheels are 14 inches in diameter and 2-1/4 inches in
thickness. (See fig. 33.)
(12) _Power hacksaw._ This power hacksaw is used for metal sawing and
has a blade-cooling system for high-speed cutting. Its capacity is 9
by 9 inches, it has 3 speeds, and is driven by a 3-phase, 60-cycle,
208-volt motor. It comes equipped with 24 molybdenum steel blades. (See
fig. 34.)
(13) _Miscellaneous machine-shop equipment._ Miscellaneous machine-shop
equipment includes small hand and electric drills, bench lathe,
portable grinders, electric soldering sets, hydraulic press, chain-saw
sharpener, mechanic and master mechanic tool sets, jacks, vises, and
tap and die sets.
=c. Blacksmith shop.=
(1) The blacksmith shop is adjacent to the machine shop and is equipped
to handle all smithing operations. These operations include heating for
forging, annealing, hardening, and tempering metals. (See fig. 35.)
(2) The forge has an electric blower, and the hood mounted over it has
an exhaust fan to expel fumes and smoke from the forge.
(3) For working metal, there is a pneumatic, 200-pound forging hammer.
(See fig. 36.) This hammer is of the self-contained type and the
blacksmith can operate it and manipulate the work between the dies at
the same time.
(4) Other blacksmith equipment in the shop include engineer blacksmith
equipment set No. 1, sledges, tongs, and swages.
[Illustration: _Figure 21. Ship’s dispensary showing portable operating
table, operating lights, and shelves and cabinets for medical
supplies._]
=d. Carpenter shop.=
(1) The carpenter shop is on the first platform deck on the starboard
side of number 2 hatch. (See fig. 6.) The main equipment of this shop
consists of a universal woodworking machine, a 32-inch band saw, and a
portable electric saw.
(2) The universal woodworking machine (fig. 37), is powered by a 5-hp,
3-phase, 60-cycle, 208-volt motor, developing 3,425 rpm and is equipped
with 14-and 16-inch blades.
(3) The 32-inch band saw (fig. 38) is powered by a 3-hp, 3-phase,
60-cycle, 208-volt motor, developing 600 rpm. It is supplied with
general-purpose blades, a ripping fence, and a resaw guide.
(4) The portable circular saw is run by a 110-volt universal motor.
(See fig. 39.) It is equipped with two combination blades for sawing
wood; when abrasive discs are used, it will cut brick, stone, concrete,
steel, and cast iron.
=e. Pipe shop.=
(1) The pipe shop adjoins the machine shop and its main equipment
consists of a portable pipe bender and a pipe and bolt threading
machine. (See fig. 40.)
(2) The hydraulic portable pipe bender has a maximum piston pressure of
50,000 pounds and will bend up to 3-inch pipe.
(3) The pipe-and bolt-threading machine will handle 1/8-to 2-inch pipe
and 3/8-to 1-1/2-inch bolts.
=f. Welding shop.=
(1) The welding shop is on the first platform deck on the port side of
number 2 hatch. (See fig. 6.) The welding shop contains equipment for
electric-arc and oxyacetylene welding and cutting.
[Illustration:
_1. Extension-bed lathe._
_2. Engine lathe._
_3. Toolroom lathe._
_4. Universal milling machine._
_5. Radial drill._
_Figure 22. View of machine shop showing a part of the equipment and
overhead monorail system capable of handling 5 tons._]
[Illustration: _Figure 23. This DOALL machine is used for contour metal
sawing and jig work._]
(2) For electric-arc welding there are two stationary and four portable
sets. All of the sets are driven by gasoline engines and have complete
sets of accessories.
(3) The portable sets are mounted on four-wheel dollies and have a
welding range of 50 to 400 amperes and a generator rating of 300
amperes at 40 volts. The accessories include a welding-rod assortment,
50-foot electrode and ground cables, gloves, helmets, lenses, and
mittens.
(4) For oxyacetylene work, there are three oxyacetylene welding and
cutting sets and three portable acetylene generators. The sets include
cutting and welding torches and tips, 50-foot lengths of hose, tip
cleaners, oxygen and acetylene regulators, spark lighters, gloves, and
goggles.
(5) There is also a portable, preheating torch of the atomizing type
operated by compressed air.
(6) Miscellaneous equipment in the welding shop includes a brazing
and soldering set, ten 225-cubic-foot acetylene cylinders, and fifty
220-cubic-foot oxygen cylinders.
=g. Diving gear and equipment.=
(1) The diving equipment room is located on the main deck just aft the
number 3 hatch. (See fig. 6.) In this room are lockers for diving gear,
the recompression chamber, hangers for holding the diving suits, and a
work table for repairing suits.
[Illustration: _Figure 24. Ten-inch toolroom lathe with 4-1/2-foot
bed._]
(2) The recompression chamber (fig. 42) is used for testing divers’
ability to withstand pressure before diving and to decompress divers if
they develop compressed-air illness (bends).
[Illustration: _Figure 25. Extension-bed gap lathe, 20-by 40-inch with
14-foot bed._]
[Illustration: _Figure 26. Engine lathe, 16-by 54-inch._]
[Illustration: _Figure 27. Twenty-four inch universal shaper for
facing, notching, keyseating, and die making._]
[Illustration: _Figure 28. Radial drill with 4-foot arm and 11-inch
column._]
(3) For deep-sea diving, there are two No. 1 diving outfit sets. (See
fig. 41.)
(4) Other equipment in the No. 1 set includes an air compressor,
descending and stage lines, decompression stage, telephone, diving
lamp, air and telephone hose, and diving weights.
(5) For shallow-water diving in depths up to 36 feet, there are four
No. 2 diving outfit sets. (See figs. 43 and 44.)
(6) The rest of the diving equipment includes a canvas workers set No.
1, carpenter equipment set No. 2, gasoline-engine-driven, skid-mounted
air compressor with a capacity of 60 cubic feet of air per minute,
electrodes for underwater cutting, a pneumatic tugger hoist for the
diving stage, and a portable air lock.
[Illustration: _Figure 29. Universal milling machine No. 2,
horizontal._]
=h. Compressed-air equipment.=
(1) An assortment of compressed-air equipment is carried for doing
jobs both on and off the ship. This equipment includes rock drills
for drilling in rock or concrete; paving breakers used in breaking
out concrete, breaking up rock, and in general demolition work;
rivet busters for cutting out rivets; woodboring drills for boring
various-sized holes in timbers; rotary drills for drilling holes in
steel plates and beams; grinders for general grinding; pneumatic
hammers for cleaning castings, beveling seams on ships, and chipping
holes in concrete; riveting hammers for driving rivets; pneumatic
wrenches for tightening and loosening nuts and bolts; nail drivers;
chain saws adapted for cutting pilings underwater; and circular saws.
[Illustration: _Figure 30. Combination punch and shear machine._]
(2) For operating this equipment, there is a 315 cfm, Diesel-driven,
skid-mounted air compressor and a 280 cfm, electric-driven air
compressor.
=i. Beach gear.=
(1) The beach gear carried on the ship is used primarily to salvage
stranded vessels. This type of salvage differs from raising sunken
wrecks, where all the work in preparing the vessel for raising is
done by divers. For beach salvage work, divers ordinarily are needed
only for examining the stranded vessel’s hull and the nature of the
underwater terrain, and beach gear and the towing power of other craft
are used to refloat the ship.
(2) The main items of the beach gear are two 8,000-pound anchors,
blocks of various types, hooks, clips, chains, manila and wire rope,
shackles, cable stoppers, and rope thimbles.
[Illustration: _Figure 31. Column-type drill. This drill has a 1-inch
capacity in steel._]
=j. Portable salvage pumping equipment.= The portable salvage pumping
equipment consists of one 10-inch, two 6-inch, and two 3-inch salvage
pumps, complete with spare parts, hose, metal suctions, and adapters.
[Illustration: _Figure 32. Combination tool and cutter grinder._]
[Illustration: _Figure 33. Pedestal grinder for tool sharpening._]
=k. Portable fire-pumping equipment.= The portable fire-pumping
equipment consists of a two-wheeled trailer pumper with a capacity of
500 gpm and four 50-foot lengths of 2-1/2-inch hose.
=l. Hoisting equipment.=
(1) The hoisting equipment consists of the 40-ton cathead mounted on
the prow, one 50-ton and four 10-ton booms on the foremast, and two
5-ton booms on the mainmast, together with the winches for operating
them. (See fig. 45.)
(2) The cathead (fig. 46) is used to raise debris and sunken small
craft that are hazards to navigation or prevent vessels from coming
alongside wharves or piers. It is operated by a two-speed winch
installed in the forecastle peak on the shelter deck.
(3) The 50-ton boom is operated by a two-speed winch and the four
10-ton and the two 5-ton booms are run by single-speed winches. (See
fig. 47.)
[Illustration: _Figure 34. Power hacksaw for metal cutting._]
[Illustration: _Figure 35. View of blacksmith shop showing 48-inch
forge and 200-pound anvil._]
=m. Floating equipment.= In addition to the life-boats and rafts,
the ship carries a steel pontoon barge, a plane-rearming boat, and a
utility boat.
(1) The barge is made up of 21 sections (fig. 48) and has a capacity
of 50 tons. It is propelled by a 115-hp outboard engine and carries a
5-ton crawler crane for diving and salvage operations. The sections of
the barge are stowed in the number 1 hold of the ship.
(2) The plane-rearming boat is 33 feet long and is powered by a 100-hp
inboard, Diesel engine. It is used for diving, general utility work,
and light towing.
[Illustration: _Figure 36. Pneumatic, 200-pound forging hammer._]
[Illustration: _Figure 37. Universal woodworking machine with steel
table and two extension roller tables._]
(3) The utility boat is 26 feet long and is propelled by a 95-hp
gasoline or Diesel engine. It is used to tow the barge and floats and
for general errand work.
=n. Miscellaneous equipment.= Miscellaneous equipment includes:
Clamshell bucket, 3/4-cubic-yard.
Jacks, including a 50-ton hydraulic jack.
Cargo nets.
Demolition, rigging, and tinsmith equipment.
[Illustration: _Figure 38. Woodworking 32-inch band saw._]
11. SUPPLIES FOR PERFORMING MISSION.
The ship’s cargo capacity does not permit carrying large quantities of
supplies. Limited amounts of the most essential items are carried. They
are listed by types as follows:
=a. Machine-shop stock.= Supplies for the machine shop include 13-inch
bronze-alloy round bars of various diameters, 11-foot cold-rolled steel
bars of different sizes, square-and round-tool-steel bars, and 5-foot
lengths of keystock steel from 1/8 to 3/4 inches wide.
[Illustration: _Figure 39. Portable electric saw._]
[Illustration: _Figure 40. View of pipe shop showing supply of pipe in
racks._]
=b. Carpenter shop supplies.=
(1) Lumber for the carpenter shop is structural-grade fir in 16-foot
lengths and varying in size from 2-by 1-inch to 12-by 12-inch.
(2) There are 800 pounds of nails that range in size from 2d to 60d,
and a supply of wood screws.
=c. Pipe stock.= The pipe varies in size from 1/4 inch to 6 inches and
comes in 12-foot lengths. There is a supply of nipples, elbows, tees,
valves, and unions for the different sizes of pipe.
=d. Ammunition.= The ship’s magazines hold 32,400 rounds of 20-mm and
312 rounds of 3″/50 cal. ammunition.
[Illustration: _Figure 41. Diver in No. 1 diving dress ready to go
down._]
=e. Miscellaneous supplies.= Miscellaneous supplies include gasoline,
lubricating oils and greases, cement, canvas, roofing, chicken wire,
hardware, plugs, and structural steel.