ATON Flashcards
What is the most common type of lift bag used in ATON?
Open/Parachute
What is the primary concern when bundling chain underway?
Make sure it doesnt drag.
What are the primary considerations for top disconnect/reconnect?
Relieving staring on the split key and maintaining control of the chain/buoy.
What is the minimum hose length for a fill whip.
15ft
When bundling chain underwater, due to the difficulty of estimating distance underwater, its important to measure ______ of the chain, using a ________ prior to commencing the tow.
Depth. Depth gauge.
What type of scuba cylinder is ideally suited for lift bag operations, and why?
Aluminum, because of their corrosion resistance.
Where is data on chain weight located?
Data sheet 2.M.1 in the ATON Tech manual.
What is used to pull the bitter end of a chain closer to the buoy bridle?
Fairlead.
Where can information on ATON servicing history be located?
Federal Aid Information Document (FID)
When towing an aid. The towline should be made off to the ________. Additionally a _______ may be the best choice given seastate.
Buoy hull or liftbag shackle, not the sinker. Pillow type.
The sinker shall be replaced if the bail is worn to less than ________ of it’s original diameter.
½
What equipment is required to perform a mooring inspection?
Calipers/Micrometer and a diver’s slate.
Where are minimum chain measurements located?
ATON Tech manual. Table 2-12
Inspection caliper/micrometer must be able to read _______ of an inch.
1/32
The overpressure relief valve on the closed lift bag lifts at ________ over-bottom pressure.
3-7psi’
Open or parachute lift bags range from ______ to ______lb capacity?
50-12,000
_______ft = 1 fathom, _______ fathoms= 1 shot of chain.
6 15
What is the first step in most ATON evolutions?
Attaching a short-stay to the sinker bail.
AID SYSTEM COMPONENTS: Buoy.
Floating hull, appendages, and the chain bridle.
AID SYSTEM COMPONENTS: Chain.
The length of chain from the bridle down to and including the pigtail. Includes the CHAFE which is most critical.
AID SYSTEM COMPONENTS: Sinker.
Concrete weight and bail.
For liftbag opoerations, what type of cylinder MAY be used? What type of cylinder is preferred?
ANY SCUBA cylinder may be used. Aluminum is preferred.
What are two considerations when it comes to Rotten Stops?
Breaking strength and resistance to chafing.
When is a line considered at short stay?
When no more line can be taken in, and the line pulls back sharply as the bow rises with the seas.
What must be done prior to a mooring chain being disconnected from the sinker?
Divers must attach a line, accessible on surface, to the sinker bail.
With good positioning data, divers may locate a sinker by using what?
Automated Aids Positioning System. (AAPS)
AAPS has a tolerance of less than _____.
1 meter.
Unless the dive team includes a qualified _______ the AAPS must be operated by the requesting unit.
Aids Positioning Tech.
A split key is opened ____ to ____ degrees.
30-45
Clear lines of communication between _____ and ____ are critical for safe live boating.
Dive supervisor and Coxswain.
One way to mitigate risks of live boating, is to designate a ______.
Safe ascent points.
A chain morning consists of 3 parts; At a minimum the ____ shall be inspected.
Riser, chafe, and bottom. The chafe must be inspected.
Inspect the chafe for wear by measuring _____ of the most worn links.
the smallest parts.
Any chain that is ____, ____, ____, or ___ SHALL be replaced.
deformed, stretched, bent, or twisted.
ATON Battery Recovery
Up to a ______ yard safety area may be established and enforced by the CG.
1000 Yard.
ATON Battery Recovery
Divers will search the bottom out to a radius of at least _____ around the center of the site.
50 yards.
ATON Battery Recovery
Only batteries that are ____ or ____ shall be recovered.
On surface of the bottom or partially uncovered.
ATON Battery Recovery
Any batteries that are ______ shall not be moved or uncovered. Report to the Dive Supervisor, and plot.
entirely buried.
On deploying sinkers, who gives the command to deploy?
The dive supervisor.
Primary considerations for completing a BOTTOM side disconnect:
Maintaining control of the aid once disconnected.
Marking the sinker if leaving the area.
Primary considerations for a BOTTOM side RECONNECT
Deploy chain down shortstay to the sinker
Ensure divers are above the load.
Lift-bag manufacturers design dump valves to vent as the load rises, provided the load is at least ___ percent of the bag’s rated lift capacity.
80%
Concerning underwater rigging, a conventional rigging system consists of either a ____ inch diameter 6x37 wire rope, or a ___ inch diameter polyester rope.
3/4 inch
1 inch
The wire rope rigging system can handle a load up to ____lbs. The polyester line rigging can hoist a max load of ____ lbs.
10,000
5,000
