Divers Down/Man Below system Flashcards
Divers down means?
Divers who are working on the ship underwater
Health & safety considerations during divers down
- Shaft brake is on
- No discharge overboard
- All sonar turned off
- Cathodic protection off
- CPP is locked off
Describe Man below system
A board in the SCC where an ET places their man below tally, which indicates the compartment they are working in.
* STP
* Gas turbine room
* Funnel
* MGR ( Contaminated oil tanks)
Man below procedure
- Check hazard log sheet
- Get ppe
- Get permission
- Inform S/R
- Place man below tally on board
Define confined spaces
A confined space is a compartment which has remained unventilated for more than 24hrs
eg: Fuel,water,ballast tanks and STP’s
Hazards & precautions of confined spaces
Hazards include- Gas,vapour or fumes from contents
Precautions-
* Use a Leader gas monitor placed at head height (Tests for methane,oxygen and hydrogen sulphide) visual & audio alarm
* Space is cool
* Space is force ventilated for 24hrs min
* Test atmosphere after 24hr
* If still unsafe ventilate for a further 12hrs
* Gas free certificate is obtained
* PPE is worn
* Sentry with a BA posted outside
* Comms with sentry
* Lifeline worn
* No smoking