Fuels Flashcards
Combined diesel and avcat
When water temperature goes below -1 degrees, 50:50 measure of dieso and avcat can be used to prevent the dieso from waxing
Marpol precautions
SOPEP
Ships oil pollution emergency plan
Reportable discharge
Those that cause a sheen on the water
Those that violate applicable water quality standards
Those that cause a sludge or emulsion beneath the surface or upon adjoining shorelines
Reporting tiers
1 Small operational spill employing local resources during clean up
2 Medium spill requiring regional assistance and resources
3 Large spill requiring national assistance and resources, national contingency plan activated
Precautions during fuelling
Fuel expansion
Fire and explosion
Over pressurising hoses
Smoking and naked lights
Informing personnel
Prevention of fuel spills
Emergency fuel accumulators
In event of power failure, two emergency accumulators provide fuel to allow limited time for electrical supplies to be restored, without losing propulsion, and to enable controlled shutdown for gas turbines, 8 minutes at idle, 2 minutes at full power
Fuel contamination
Water - condensation in tanks, leaks in tanks, embarked during fuelling
Dirt - from fuel degradation
Sodium - from salt water contamination
Surfactants - from detergent from tank cleans
Microbiological contamination - live and feed in water, aerobic
Sulphide reducing bacteria - forms when oxygen has been depleted by MBC, anaerobic
Aviation fuelling ME responsibilities
Supply of filtered fuel in fuelling main
Draining of de fuelling main to fuel stowage
Maintenance and replacement of fixed filters, hose reels, pressure control and relief valves
Operation of shut off valves to the fuelling hoses
Operation of change over cocks of streamline filters
Filtering of fuel with portable filters if necessary
Custody, maintenance and replacement of fuelling hoses, nozzles, adapters and HIFR equipment
Parts of filter/water absorber
Fluted rod
Division plate
Paper discs
Differential pressure gauge
Hose end pressure controller
Air pressure is used as control medium
Readily adjustable to suit aircraft requirements
Control to within 5psi of selected pressure up to 500 gal/min
Avcat contaminates
Solid matter
Fuel soluble products
Water
Fungal growth
Avcat water test occasions
Prior to embarkation
Every 10 mins during embarkation
Prior to flying stations
Every 24 hours during flying stations
24 hours after embarkation
Before and after transferring
After heavy sea conditions/ship movement
When contamination is suspected
Once a week when system is not in use
FWO responsibilities
Ship fuel inspection visits
Ordering dieso and avcat
Gauge calibration
General advice on fuel and systems
