How many people can the PRM hold?
16 rescuees and 2 crew
What is the max angle the PRM can mate to DISSUB?
List/trim angle up to 45 degrees
How is the system powered?
Powered by two generators in the generator van
Bouyancy in PRM?
PRM is kept slightly positive bouyant 0-200lbs
PRM hatches
425 lbs, double acting, bayonet locking lug type hatch
Deck transfer lock
Hatch on forward end of PRM that is vertically oriented, swings inward to stbd and can be operated from inside or outside PRM
Transfer skirt
Hatch slightly forward of amidships on the deck is opened/closed hydraulically by the jet/hatch system or by the man-winch
Jettison and hatch control system
Co trips umbilical cutter, umbilical release, forward and aft clump weight jettison and transfer skirt hatch. (All except transfer skirt are single action
Cameras
7 cameras on the PRM frame, fwd and aft navigation cameras and the landing/navigation assist camera are pan/tilt
Max depth PRM can mate to dissub
2000fsw
Approximate weight of PRM
45,000 lbs
Primary supply voltage the the bus panel is?
24 vdc
Normal O2 limits in PRM
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What does the high level O2 alarm sound at?
21.5%
What does the low level O2 alarm sound at?
17.5%
Primary functions of PRM pressurization system?
1)Make up air when pumping down the transfer skirt
2) pressurize PRM to equal DISSSUB pressure
3) Air supply to EBS
Describe the uses and capacity of the man winch
Working kid of 310 lbs, 50 feet of cable used for raising, lowering supplies/ injured personnel.
Used as a means to open/shut TS hatch
Describe the characteristics of transfer skirt hatch
Double acting, bayonet locking
Lug type hatch
How long is the rescue ladder stored in the PRM?
19.7 feet long
What is high co2 level? And what is very high co2 level?
10 millibar, 15 millibar
What is the purpose of the primary skirt vent system?
1) to eliminate trapped air during launch
2) Used to flood TS during de-mating
3) to eliminate suction effect during recovery
How many Co2 canisters are in the PRM and where are they located?
Total of 20, 6 in scrubber assemblies, 2 in EBS, 2 under aft IA seat. 10 spares
Describe the EBS system
Two lung powered breathing loops supporting ten breathing stations in each loop. 2 for attendants and 16 for rescuees
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How does the co2 removal system function?
Atmosphere is drawn through sofnolime canisters by fans in the canister housing base.
List all communications systems inside PRM
VHF, clear comma, through water comms and sound powered phone
Tap codes
Video camera, lights and writing
What actions must be accomplished following the completion of a dive in order to prepare for a subsequent dive?
Fill canisters, prepare OP 4's
How many HP dewatering pumps are there on the PRM? And where are they located?
Two HP dewatering pumps, #1 forward-starboard-lower #2 forward-port-lower
At what pressure is an 02 cyclometer considered empty?
When pressure drops to 195 psig
How is oxygen dispersed and circulated inside PRM?
O2 diffusers introduce 02 inside the PRM and the blower fans circulate the o2