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1 and done. > Searches > Flashcards

Searches Flashcards

1
Q

As a general rule, for small devices such as limpet mines, a ____ safety zone is appropriate

A

200yard.

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2
Q

The constant change in water pressure increases the opportunity of POIS or Barotrauma during what kind of search?

A

Vertical Pile Search.

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3
Q

Plotted size of a search will increase based on what?

A

Amount of time that has passed since the incident.

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4
Q

What search method should be used for evidence recovery dives?

A

Grid searches.

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5
Q

What is the semi-circle search used for?

A

Locating small objects.

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6
Q

What search is best used for ZERO visibility to find SMALL objects?

A

Jack-stay

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7
Q

In many cases, a lost object recovery is a ____ ____ item that must be recovered without attracting public attention.

A

High value item

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8
Q

What two reasons should a grid search be used?

A

Evidence recovery or when precise location date is required.

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9
Q

When conducting or planning a search, modifiers include what?

A

Strong currents or large surface areas that are more readily affected by current.

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10
Q

Line used for circle searches should be ______ or less?

A

50ft

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11
Q

Level of inspection to be used is usually determined in the _______ phase?

A

Planning

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12
Q

What type of search is preferred in moderate current?

A

Creeping line search

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13
Q

What is the most expedited search?

A

Towed search

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14
Q

How many buoys does it take to complete a grid search?

A

At least 8.

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15
Q

What is considered the most effective utilization of divers in ships bottom searches?

A

Buddy pair jackstay.

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16
Q

How many grids must be in place before beginning a grid search?

A

At least 2 minimum.

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17
Q

What computations determined the size and distance of a search?

A

Time, distance, and speed given the measured current.

18
Q

When must a towline be hand tended during a tow search?

A

When line pull signals are used.

19
Q

When the advance team speaks with the witnesses, they should use _______ interview technique.

A

Standard.

20
Q

While interviewing the witnesses, the team leader should segregate them and not let them talk amongst themselves. (T/F)

A

TRUE

21
Q

Strongly negative buoyant items will most likely be located where?

A

Near the observed position.

22
Q

What are the 7 most common lost object search techniques?

A

Circle/Semi-circle; Jackstay; Grid/modified grid; in-line search; expanding square; parallel or creeping line search; towed search.

23
Q

Divers should always be assigned a particular area to search. After it has been searched, the area must be ______ and on a chart to avoid searching it again.

A

Marked with a buoy.

24
Q

What is the importance of maintaining a dive log during evidence recovery dives?

A

If search is in support of law enforcement, the diver may be required to testify.

25
Q

Grid searches are ideal to find what?

A

Objects less than 1 cubic feet.

26
Q

What are the different kinds of free swimming search?

A

Expanding square, parallel, creeping line.

27
Q

Circle of Probable Error modifies probable search zones by creating what?

A

A circle of probable error with it’s center point on the current line.

28
Q

Where should interviews of witnesses be conducted?

A

At the scene of the incident.

29
Q

What search can be used in LOW VIS to find small to medium objects?

A

In-line search.

30
Q

What is the prescribed size for an in-line search?

A

50yards x 25 yards

31
Q

What is needed to perform a circle search?

A

Clump, buoy, weighted index line, search line on reel/h board.

32
Q

What should all UHDs be assumed to have?

A

Timers

33
Q

Whats the slowest and most thorough search?

A

Grid search.

34
Q

What length of line is usually too long for searches?

A

50’

35
Q

What 4 things from the incident site should personnel use to focus on interviews?

A

Incident report, any maps, photographs, or sketches.

36
Q

Whats the first question to ask witnesses?

A

How was an object lost? From a vessel, shore, during water crossing exercise?
If lost from a vessel, what was their position, speed, course, and bearing.

37
Q

In searches, what is CPE?

A

Circle of probable error.

38
Q

What could be essential to success prior to a search?

A

rehearsals and dirt dives.

39
Q

Minimum distance from Sonar activity

Hooded/Unhooded/Helmeted.

A

Hooded (3/16”) 600y
Unhooded: 1000y
Helmeted: 3000 yards

40
Q

Loops or carbines are spaced every ____ ft on a modified necklace search?

A

5 ft.

41
Q

How large is the buoy diameter in a necklace search?

A

11 inches.

42
Q

Maximum jackstay length on a vessel hull is _____ft.

A

200ft

1 and done. (22 decks)

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