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DV SWE > 3150.2 > Flashcards

3150.2 Flashcards

1
Q

How many hull searches are there and what are they?

A 
There are 4 different hull searches;
1-Jack Stay 
2-Two Diver 
3-Necklace & Half Necklace
4-Floating Buoy (Modified Necklace)
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2
Q

Why should buoys not be used with the full-necklace search technique?

A

It will prevent diver from surfacing in an emergency situation

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3
Q

Floating Buoy (Modified Necklace) Hull Search
Tell me about it?
Characteristics?
Equipment Needed?

A 
May be preformed by 1 or 2 divers when not  enough  personnel are available to complete a half or full  necklace search.
Characteristics; 
-Minimal set-up time
-Divers sweep 1 side of hull at a time
Equipment Needed; 
-Necklace line
-Comms recommended to improve coordination  
-Buoy
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4
Q

Necklace Hull Search / Half Necklace
Tell me about it?
Characteristics?
Equipment Needed?

A

Most rapid when adequate number of divers are available.
Characteristics;
-Minimal Set-Up Time
-Requires large number of divers
-Significant practice is required to coordinate with a large number of divers
-Divers sweep one side of hull at a time
Equipment Needed;
-Necklace line
-Through-Water comms recommended to improve coordination
-Buoy may be used with the half necklace search

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5
Q

Two Diver Hull Search
Tell me about it?
Characteristics?
Equipment Needed?

A

Can be used in murky water suited for locating small objects.
Characteristics;
-Requires significant time set up
-Tender must be stationed on the vessel
-Divers sweep one side of the hull at a time
Equipment Needed;
-Two hogging lines

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6
Q

Jackstay Hull Search
Tell me about it?
Characteristics?
Equipment Needed?

A

Can be preformed by one diver or buddy pair
Can be used in murky water & suited for finding small objects
Characteristics;
-Requires significant time to set-up
-Buddy pair search most often best technique
-Tender must be stationed on vessel
-Diver sweep one side of hull at a time
Equipment Needed;
-Two hogging lines
-One jackstay line
-Metal Magnetics can be used in line of clove hitch for searching the jackstay line

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7
Q

When repositioning hogging lines or tending lines what must personnel ensure they don’t snag?

A

Limpet Mines

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8
Q

How many Bottom Searches are there and what are there names?

A 
There are 7 different Bottom Searches
1-Semi-Circle
2-Circle
3-In-Line
4-Jackstay
5-Grid
6-Free-Swimming ((CS)(PS)(ES))
7-Towed
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9
Q

Towed Search
Tell me about it?
Characteristics?
Equipment Needed?

A

The fastest search, most effective in optimal conditions when looking for large reflective objects
Characteristics;
-Requires extremely experienced Divers
-Only effective during daylight
-Minimal planning and set-up required
-May be preformed with one or more divers
-Requires excellent visibility
Equipment Needed;
-Plane board (preferably with built in SDG)
-Tow Line
-FFM with through water communications

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10
Q

Free Swimming Search
Tell me about it?
Characteristics?
Equipment Needed?

A

Used in good visibility to locate medium or large objects Expanding Square (ES) -High confidence in search datam
Parallel Search (PS)- Low confidence in object and location
Creeping Lines (CS) - Difficult search because of number of turns requires
Characteristics;
-Requires extremely experienced divers
-Minimal planning with one or more divers
Equipment Needed;
-Compass

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11
Q

Grid Search

Tell me about equipment needed? (5 things)

A

1-Buoys-minimum of 8
2-Clump lines
3-Bottom markers (Must be highly visible)
4-Compasses
5-Diver Boat with positioning equipment for placing clump lines

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12
Q

Grid Search

Tell me about it / characteristics?

A

Extremely thorough technique that can be used in high & low visibility to find small objects
Should be used for evidence recovery or any time precise location data is required for found object
Characteristics;
-Requires extremely experienced divers
-Requires times consuming set-up
-Two or more grids must be placed before beginning
-Used to find objects less than 1CUFT or because the color matches the bottom
-Used with other searches to cover large area
-Can use in Good or Bad visibility
-Used when the current is less than 1 knot
-Slowest but most thorough of searches

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13
Q

What will dictate the size of a search pattern?

A

On scene conditions and available equipment

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14
Q

Jackstay Search
Tell me about it?
Equipment needed?

A 
Extremely through search technique. Can be used in 0 visibility and used to find small objects
-Requires experienced divers 
-Requires time-consuming set-up
-Slow execution 
Equipment
-Two 50 yard grid line
-One 25 yard jackstay line 
-4 buoys 
-Compasses
-Dive Boat with positioning equipment for placing clump lines
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15
Q

In-Line Search
Tell me about it?
Equipment needed? (6 things)

A 
Can be used to find  small-medium sized objects in low  visibility.
-Requires experienced divers
-Requires time consuming set-up
-slow execution
Equipment
1-Two 50 yard grid lines
2-One 25 yard  search  line 
3-Four buoys
4-Four clump lines
5-Compasses
6-Dive Boat  with positioning equipment for placing clump lines
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16
Q

Are Coast Guard Divers equipped to preform search dives for ordinance in open water (Sea Mines)?

A

No, Sea mines have magnetic triggers that could be detonated by standard Coast Guard Diving equipment

17
Q

What is the probability of success determined by in bottom searches?

A

1- Accuracy of the location
2- Bouncy of Object
3- Local current

18
Q

Vessels can do what protective measure to help minimize potential damage caused by a UHD?

A

Compartment flooding. Vessels must decide if protective measures outweighs the damage caused by the UHD

19
Q

As a general rule of thumb, for small devices such as a limpet a _______ safety zone is appropriate ?

A

200 yards

20
Q

When marking a potential UHD on a vertical surface where do you attach?

A

Above, or outboard and down current from potential device

21
Q

What UHD is designated fir placement inside piping exposed to the sea?

A

The Soviet SPM

22
Q

What are light sensor firing systems LEAST responsive too?

A

Blue or Violet light

23
Q

Is diver safe standoff distance data available for small limpet sized charges?

A

No data available

24
Q

All UHD’s should be expected to operate on what?

A

A timer

25
Q

The changing of water pressure increases the

opportunity of POIS or barotrama during what search?

A

Vertical Pile Search

26
Q

What should be in the water any time divers are operating in medium current>

A

A chase boat

27
Q

What kind of search is done prior to the arrival of a high value asset to ensure no UHD have been placed during periods of lessoned security?

A

Pier search

28
Q

Circle Search
Tell me about it?
Equipment needed for it? (4 things)

A

Suited for locating small objects
-May be preformed by less experienced divers
-Works well in open water with minimal current
-Is the easiest method to support from a boat
Equipment;
-Clump Line
-Bouys
-Weighted index line
-Search Line on a real or H-Board

29
Q

Semi Circle- Circle Search
Tell me about it?
What equipment is needed?

A

-Can be used in murky water
-Fairly Quick
-May be conducted from shore or boat
-Comms may be conducting with pull signals
Equipment;
-A signal line to attach to diver
-At least one U/W compass is suggested

30
Q

Are Coast Guard Divers trained or equipped to preform quick-step or render safe procedures (RSP) on ordnance?

A

No, only qualified EOD possess that capability

31
Q 
Floating Buoys (Vertical Necklace) Pier Search
Equipment needed?
A

1- Buoy
2- Through-water comms are recommended to improve coordination
3- Necklace Line

32
Q

Vertical Piling Search

Equipment needed?

A

A optional guide line used to move from 1 piling to t he next. Begin the search up current and use the guide line to move down.

33
Q

What risk are there when diving around piers and berths?

Risk and Safety Hazards?

A

The risk of entanglement, lack of free access to the surface, crushing hazards must be carefully evaluated prior to commencing the dive

DV SWE (16 decks)

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