SUP Flashcards
External Survey
Checking for damage ,running gear, sonar, exterior hull
Internal survey :
Checking for damage flooding, holes, cracks
All Navy salvage ships have a maximum bow lift of
150 Tons
Line handlers should stand__ off of a line while working it.
90 degrees
At what temperature is a dry suit or hot water suit recommended ?
Below 40 degrees
What are Cofferdams?
temporary watertight extensions of the hull to the surface.
What are the 3 types of cofferdams
- Complete
- Partial
- Small
A complete cofferdam is used when?
Vsl is sunk in sheltered waters
Temp repairs/sealing deck impractical. Main deck has many openings. Make decision to use only after detailed survey by salvage eng and salv officer
What are the UWSH manuals that deal with running gear?
Chapter 3,
Chapter 12
Chapter 13
Chapter 18
What NSTM deals with inspecting a CPP?
NSTM 245
After divers have surfaced and confirmed no obstruction then the dry dock will ___ to land the unit.
Be drained enough
A minimum of __ will be maintained between the floating dry dock and harbor bottom at all times
12”
What is the minimum length of the electrode before changing?
3”
Safety switches (when open) pose no electrical threat to the diver.
True
Both double pole and single pole are switches are authorized?
True
A double pole switch is most often used because because?
Both the working and the ground lead are opened or closed simultaneously
What are the 3 general types of work documents?
- Maintenance Procedures
- Formal Work Packages
- Controlled work packages
Maintenance Procedure MP
Task of maintenance performed.
Self explained
Formal Work Package FWP
Coordinates in a single document materials required, initial conditions, MP, Test and Inspections and system restoration for the selected maintenance task.
Controlled Work Package CWP
Required when higher authority requires a record (OQE) of repairs/maintenance for fabrication, repair, installation, inspection, and testing process for specific systems.
Work Authorization Form
Filled out by entity performing work. Signed/verified by CDO. Signed by force who completed once it is done.
Using Mk20 (ss) or MK 21 or EXO BR divers may enter sub ballast, mud tanks or cofferdams
True
Requirements for divers in tanks:
Tended by diver outside space, EGS must be inside space or on surface with a whip 50-150 ft long
NSTM 074 dictates the hourly testing of the tanks atmosphere.
True
The air should be flushed twice and tested before a diver removes hat. If diver smells any unusual odors they should don EGS
True
Oxygen levels less than 19.5% or Greater than___ shall be considered as immediately dangerous to life or health.
22%
Level I and II Hull inspections are considered as ?
Non invasive inspections meaning nothing is removed or disassembled.
Level I inspections are in the scope of what?
Stern to Stem of the entire hull and appendages.
Level II Inspections are in the scope of what?
System specific, non invasive.
Level 3 inspections are in the scope of what?
System specific, invasive procedures requiring some amount of disassembly of the system.
Double valve closure is accomplished by using?
Installed valves, blank flanges, outside closure plates, or shaft seals.
If a system has NOT been drained, open the closest system ____ to conduct a controlled leak check of the single closure.
High-point
If the system HAS been drained, open the closest system ______ vent to conduct a controlled leak check of the single closure.
Low-point
An SRD is?
Sonar Rubber Dome, bow or Keel mounted.
SRD purpose
Surrounds and protects the ships sonar system. In service, it is filled with water at a pressure sufficient to withstand hydrodynamic loads. Provides a low drag shape with smooth, quiet, non cavitation water flow.
When required (Radcon) divers shall have a ?
Thermal Luminescence Dosimeter (TLD)
Contaminated areas found on Radcon hull surveys shall be ?
Marked so divers can see them
Quad blocks for purchase systems should have 2 ___ 4 sheave blocks.
5/8”
Quad blocks should have ___ ft of ___ “ wire rope
1200
5/8
Main bow roller does what function?
Supplies all or part of the lift force needed to recover a ship or other object. All navy ships are limited to a bow lift capacity of 150 tons.
75 tons per wire. Can be used in conjunction with stern(150) for total of 300 tons using all 4 wires.
When leading chain around a corner the dia. Of the bend must be at least __ times the dia. Of the bar that forms the chain.
7
When chain is led over or around a curved surface at least __ links of the chain should be in contact with the curved surface.
3
Linear puller has an approximate pull of?
200,000
What are the two different methods of dewatering ?
- Pumping
- compressed air dewatering
Linear puller can apply what level of pull to beach gear?
50 Tons
Which patching materials may be used for small openings?
Plywood.
What are 3 different types of leaks?
- Minor
- Moderate
- Major
Minor Leaks are ?
Hull cracks, broken pipes, loose seems, small holes.
-patch with wooden plugs, wedges and GRP.
Moderate Leaks
Hull or blkhd opening that cannot be closed as above usually requiring preparation.
Major Leaks
- Extensive hull/blkhd damage
- patches require large steel work operations and extensive dive ops
What are the two types of educators?
- Peri-Jet
- S type
