DSO planning, Casualty control, diving operations

Question 1

Data required for all diving Operations 6-4.4

Answer 1

Surface conditions, Underwater conditions, Equipment and personnel resources, Assistance in emergencies

Question 2

Any vessel used for dive ops shall be secured by a _____ moor or _____ system

Answer 2

2 point, Dynamic position class 2/3

Question 3

The exception to diving on a vessel not in a 2 point moor or utilizing DP system is

Answer 3

Moored alongside a pier or another vessel properly anchored, diving during open ocean transits cannot moor due to depth.

Question 4

Tending personnel shall guard against

Answer 4

Sunburn, Hypothermia/frostbite, Heat exhaustion

Question 5

Mk 21 SSDS current limitations

Answer 5

1.5 knots without difficulty, 2.5 knots with extra weight

Question 6

Scuba diver is severely handicapped in currents greater than

Answer 6

1.0 knot

Question 7

four main types of air diving equipment

Answer 7

Scuba, MK20, MK21, EXO BR

Question 8

Factors in selecting dive medium

Answer 8

Duration and depth, Type of work, Environmental conditions, Time constraints

Question 9

Depth limits shall not be exceeded without approval from

Answer 9

CNO

Question 10

Scuba depth limits

Answer 10

130 normal, 190 CO/OIC approval

Question 11

Scuba cylinder SCF to go deeper than 100

Answer 11

100SCF

Question 12

DMO required on the side for all Air dives deeper than

Answer 12

190FSW

Question 13

SSDS diving systems

Answer 13

Lightweight - MK20, Deep Sea - Mk21/KM-37

Question 14

Review the following before diving

Answer 14

Diving safety and planning checklist, Ship repair safety checklist, SSD predives, support control of operations.

Question 15

MK 21/ km 37 limits /EGS requirements

Answer 15

190 fsw, deeper than 60 EGS and when diving enclosed spaces

Question 16

EGS length for enclosed space

Answer 16

50-150’

Question 17

EGS relief valve setting

Answer 17

180 +/- 5

Question 18

Mk 20 4 assemblies

Answer 18

FFM, Comms, Eqp harness, Umbilical assembly

Question 19

Mk 20 depth limit

Answer 19

60

Question 20

EGS topside Over Bottom

Answer 20

150 psig

Question 21

MK 20 mod 0 flow @ over bottom requirements

Answer 21

1.4 acfm, 90psig

Question 22

EXO flow and O/B requirements

Answer 22

less than 130’ -135-165 PSIG, 60’ - 90psig

Question 23

EXO 130-190 FSW OB requirements

Answer 23

165-225 PSIG

Question 24

SSD systems must have a _____ and ___ air system

Answer 24

Primary, secondary

Question 25

3 line pulls not answered immediately

Answer 25

Diver to tender 4,4-4-4/ tender to diver 4

Question 26

Ballast tanks must be flushed ___ and certified by a ___ and checked ___

Answer 26

twice, GFE, hourly

Question 27

Advantages of SCUBA

Answer 27

``` Rapid deployment Mobility Excellent horiz/vertical movement Portability Minimum support req Minimum borrow disturbances ```

Question 28

Dis-Advantages of SCUBA

Answer 28

Limited endurance Limited physical protection Influenced by current Lack of voice comms

Question 29

Advantages of MK20

Answer 29

Unlimited air supply Hood horizontal mobility Voice/line pull comms

Question 30

Advantages of KM-37/MK-21

Answer 30

``` Unlimited air supply Head protection Good horizontal mobility Voice/line pull comms Fast deployment ```

Question 31

Five basic criteria for air supplied to the diver

Answer 31

Air shall conform to purity standards Sufficient air flow to diver Adequate over-bottom pressure Adequate air supply Secondary air supply shall be available for ssds

Question 32

When can a Standby Diver be deployed as a working diver

Answer 32

SSDS no D dives less then 60' Same job and location Work area shall be determined free of hazards If in ballasts or confined space both divers tended by a third outside the space Standby shall remain on deck when diving salvage ops