General Q's Flashcards
- When planning a SCUBA operation what is the minimum air safety margin
providing a minimum safety margin of 25% for dives shallower than 21m, and 30% for dives to deeper than 21m
- For what reasons should a diver should keep his / her logbook up to date and accurate
It’s a legislative requirement
Holds annual dive medical details where these are recorded appropriately
It provides proof of occupational diving experience
- What do the following line signals mean? Direction signals (attendant to diver)
one pull?
Ok.
- What do the following line signals mean? Direction signals (attendant to diver)
two bells?
go out to end of distance line
- What do the following line signals mean? Direction signals (attendant to diver)
three bells
face shot and go right
- What do the following line signals mean? Direction signals (attendant to diver)
four bells?
face shot and go left
- What do the following line signals mean? Direction signals (attendant to diver)
five bells
Come in to shot or turn back on jackstay
- Give the signals for the following commands
can i come up?
4 pulls and 5 bells
- Give the signals for the following commands
take up slack lifeline
4 bells
- Give the signals for the following commands
i am foul, but can clear myself
3 bells
- Give the signals for the following commands
assist me up?
4 pulls and 2 bells
- Give the signals for the following commands
lower ?
3 bells
The greatest volume changes of a gas occurs at what depth?
0-10m
List the maintenance checks one should carry out on a normal scuba feed buoyancy
compensator
inspect wear and tear
make sure inflates / deflates
make sure holds air
rinse and inflate after use
ensure dry before storage
inspect once a year
If your buoyancy compensator device (BCD) won’t stay inflated, it might be due to several possible issues:
leaks in the bladder
faulty inflator mechanism
dump valve malfunction
lpi hose issues
