MK 25 Flashcards Preview

1C > MK 25 > Flashcards

Flashcards in MK 25 Deck (42)
Loading flashcards...
1
Q

Depth restrictions

A

Normal: 20 FSW for :240

Max: 50 FSW for :10

2
Q

Advantages

A

Stealth

Extended operation duration

Minimum support

Portability

Excellent mobility

3
Q

Disadvantages

A

Increased Hazards, CNS 02 tox

Shallow depth

No Comms

Limited thermal Protection

Greater training

Greater expense

4
Q

Weight

A

27LBs/Neutral in the water

5
Q

Cold water weight 61-41 Degrees, below 40

A

4Lbs

6
Q

MK 25 3 subsystems

A

Pneumatic, recirculation, Equipment case/harness

7
Q
A
8
Q

02 clynider specifications

A

207 bar/3000 psig

410 Litres

fill rate 200 PSI wet or dry

99.5% aviators 02

9
Q

02 reducer

A

reduces 02 to 55-75 psig constant pressure

Not servicable by Mk 25 techs

10
Q

Demand valve

A

Adds 02 to bag as required when bag is emptied on inhaation

11
Q

Bypass knob is used for

A

Purge procedures

Pre-dive

Post dive

EPs

12
Q

Breathing bag holds approx __ and a max of ___

A

4 litres, 7 litres

13
Q

In halation hose has a ____ connected to the end that connects to the mouth piece

A

1 way valve

14
Q

Exhalation hose has a ___ fitting and is ___ than the inhalation hose

A

bayonet, longer

15
Q

Dive surface valve (DSV) operates ___on, ___off

A

Up, Down

16
Q

Soda lime canister consists of 2 types ____ holding 5.75lbs of absorbant, _____ holding 5.56lbs.

A

Urethane, fiberglass

17
Q

Moisture trap can hold ___CC of water

A

200

18
Q

SECUMAR TSK Life vest is authorized to ___

A

50 FSW

19
Q

Secumar weight with bottles

A

8Lbs

20
Q

Secumar lifting force with 2400psi @ 50fsw

A

35Lbs

21
Q

Secumar has 2 ___ liter cylinders

A

42

22
Q

Operational duration of MK25 factors

A

02 supply, Metabolic consumption, gas loss

23
Q

Canister duration dependant on _____, swim at a __Knot pace, Classified by Navsea ____ DTG___

A

Water temp/excercise rate, 1, 3151, 27SEP01

24
Q

UBA 02 consumption rate

A

1.3 LPM light work, 2.5 LPM heavy work

25
Q

Unique Required Equipment

A

Flare/strobe, whistle, buddy line, depth gauge/compass 1per diver

26
Q

Change exposure limits

A

Nedu or DMO

27
Q

Dive phase Key items

A

Swim at 20FSW or shallower, Excursion carefully note starting and end time

28
Q

Transit with excursion (TWE) Depth 1-20 FSW Limit

A

:240

29
Q

Transit with excursion (TWE) Depth 21-40 FSW Limit

A

:15

30
Q

Transit with excursion (TWE) Depth 41-50 FSW Limit

A

:05

31
Q

Single Dive Limit (SDL) 25FSW time

A

:240

32
Q

Single Dive Limit (SDL) 30FSW time

A

:80

33
Q

Single Dive Limit (SDL) 35FSW time

A

:25

34
Q

Single Dive Limit (SDL) 40FSW time

A

:15

35
Q

Single Dive Limit (SDL) 50FSW time

A

:10

36
Q

Sucessive dive limits - 02 dive following a previous 02 dive within ___ is considered the same dive.

A

2:00

37
Q

Sucessive dive limits - 02 dive following a previous 02 dive within ___ is considered intial exposure.

A

4:00

38
Q

Maximum exposure to 02 in 24 hour period

A

:240/4 hours

39
Q

Rig preperation length

A

2 weeks from prep until rig is used

40
Q

absorbant does not need to be changed before second dive,as long as the duration does not exceed____ and is conducted with in ___hours

A

Duration limits, 24

41
Q

Mod 0 fiberglass canister cannot be used with ___

A

Sofnolime 8-12

42
Q
A