MK 25

Question 1

Depth restrictions

Answer 1

Normal: 20 FSW for :240

Max: 50 FSW for :10

Question 2

Advantages

Answer 2

Stealth

Extended operation duration

Minimum support

Portability

Excellent mobility

Question 3

Disadvantages

Answer 3

Increased Hazards, CNS 02 tox

Shallow depth

No Comms

Limited thermal Protection

Greater training

Greater expense

Question 4

Weight

Answer 4

27LBs/Neutral in the water

Question 5

Cold water weight 61-41 Degrees, below 40

Answer 5

4Lbs

Question 6

MK 25 3 subsystems

Answer 6

Pneumatic, recirculation, Equipment case/harness

Question 8

02 clynider specifications

Answer 8

207 bar/3000 psig

410 Litres

fill rate 200 PSI wet or dry

99.5% aviators 02

Question 9

02 reducer

Answer 9

reduces 02 to 55-75 psig constant pressure

Not servicable by Mk 25 techs

Question 10

Demand valve

Answer 10

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

Question 11

Bypass knob is used for

Answer 11

Purge procedures

Pre-dive

Post dive

EPs

Question 12

Breathing bag holds approx __ and a max of ___

Answer 12

4 litres, 7 litres

Question 13

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

Answer 13

1 way valve

Question 14

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

Answer 14

bayonet, longer

Question 15

Dive surface valve (DSV) operates ___on, ___off

Answer 15

Up, Down

Question 16

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

Answer 16

Urethane, fiberglass

Question 17

Moisture trap can hold ___CC of water

Answer 17

200

Question 18

SECUMAR TSK Life vest is authorized to ___

Answer 18

50 FSW

Question 19

Secumar weight with bottles

Answer 19

8Lbs

Question 20

Secumar lifting force with 2400psi @ 50fsw

Answer 20

35Lbs

Question 21

Secumar has 2 ___ liter cylinders

Answer 21

42

Question 22

Operational duration of MK25 factors

Answer 22

02 supply, Metabolic consumption, gas loss

Question 23

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

Answer 23

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

Question 24

UBA 02 consumption rate

Answer 24

1.3 LPM light work, 2.5 LPM heavy work

Question 25

Unique Required Equipment

Answer 25

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

Question 26

Change exposure limits

Answer 26

Nedu or DMO

Question 27

Dive phase Key items

Answer 27

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

Question 28

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

Answer 28

:240

Question 29

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

Answer 29

:15

Question 30

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

Answer 30

:05

Question 31

Single Dive Limit (SDL) 25FSW time

Answer 31

:240

Question 32

Single Dive Limit (SDL) 30FSW time

Answer 32

:80

Question 33

Single Dive Limit (SDL) 35FSW time

Answer 33

:25

Question 34

Single Dive Limit (SDL) 40FSW time

Answer 34

:15

Question 35

Single Dive Limit (SDL) 50FSW time

Answer 35

:10

Question 36

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

Answer 36

2:00

Question 37

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

Answer 37

4:00

Question 38

Maximum exposure to 02 in 24 hour period

Answer 38

:240/4 hours

Question 39

Rig preperation length

Answer 39

2 weeks from prep until rig is used

Question 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

Answer 40

Duration limits, 24

Question 41

Mod 0 fiberglass canister cannot be used with ___

Answer 41

Sofnolime 8-12