MK 25 Flashcards Preview

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Flashcards in MK 25 Deck (42):
1

Depth restrictions

Normal: 20 FSW for :240

Max: 50 FSW for :10

2

Advantages


Stealth

Extended operation duration

Minimum support

Portability

Excellent mobility

3

Disadvantages


Increased Hazards, CNS 02 tox

Shallow depth

No Comms

Limited thermal Protection

Greater training

Greater expense

 

4


Weight

27LBs/Neutral in the water

5


Cold water weight 61-41 Degrees, below 40


4Lbs

6


MK 25 3 subsystems


Pneumatic, recirculation, Equipment case/harness

7

8


02 clynider specifications


207 bar/3000 psig

410 Litres

fill rate 200 PSI wet or dry

99.5% aviators 02

9


02 reducer


reduces 02 to 55-75 psig constant pressure

Not servicable by Mk 25 techs

10


Demand valve


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

11


Bypass knob is used for


Purge procedures

Pre-dive

Post dive

EPs

12


Breathing bag holds approx __ and a max of ___


4 litres, 7 litres

13


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


1 way valve

14


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


bayonet, longer

15


Dive surface valve (DSV) operates ___on, ___off


Up, Down

16


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


Urethane, fiberglass

17


Moisture trap can hold ___CC of water


200

18


SECUMAR TSK Life vest is authorized to ___


50 FSW

19

Secumar weight with bottles


8Lbs

20


Secumar lifting force with 2400psi @ 50fsw


35Lbs

21


Secumar has 2 ___ liter cylinders


42

22


Operational duration of MK25 factors


02 supply, Metabolic consumption, gas loss

23


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


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

24


UBA 02 consumption rate


1.3 LPM light work, 2.5 LPM heavy work

25


Unique Required Equipment


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

26


Change exposure limits


Nedu or DMO

27


Dive phase Key items


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

28


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


:240

29

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


:15

30

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

:05

31

Single Dive Limit (SDL) 25FSW time


:240

32

Single Dive Limit (SDL) 30FSW time

:80

33


Single Dive Limit (SDL) 35FSW time

:25

34

Single Dive Limit (SDL) 40FSW time

:15

35


Single Dive Limit (SDL) 50FSW time

:10

36


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

2:00

37

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


4:00

38


Maximum exposure to 02 in 24 hour period


:240/4 hours

39


Rig preperation length


2 weeks from prep until rig is used

40

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


Duration limits, 24

41


Mod 0 fiberglass canister cannot be used with ___


Sofnolime 8-12

42