Boat Systems Flashcards
Pressure Water
Which pumps should you listen to?
- Bilge pump
- Electric water pump (leak or faucet left open)
De-watering
What’s a limber hole?
Hole allowing the water to drain to the bilge pump pick-up area
De-watering
What are the two possible placements of the bilge pump?
- pusher
- puller
De-watering
What key system is the bilge pump connected to?
Typically connected directly to the batteries (cannot be shut off without electrical disconnection)
De-watering
What’s the difference between a seacock and a thruhull?
- Seacock is the valve
- Thruhull is the hole the valve is attached to
De-watering
What types of valves are seacocks?
Ball-valves (as opposed to gate-valves)
De-watering
How are the hoses attached to the seacocks?
Double hose clamps
Pressure Water
What are the key components of the water system?
- 2 tanks
- 2 valve
- Manifold (distribution)
- Manual galley pump
- Electric pump
- Accumulator tank
- Cold water outlets
- Hot water tank
- Hot water outlets
Electrical Systems
How are AC and DC systems connected?
Only via the charger
Electrical Systems
How is the capacity of house-batteries measured?
AmpHours
Electrical Systems
What is the voltage of a fully charged house battery?
12.8V (100% charge)
Note: while charging batteries the voltage may show 13.8V
Electrical Systems
At what voltage should a battery never go below?
12.2V (50% charge)
Electrical Systems
At what voltage is the house battery useless?
11.9V (25% charge)
Electrical Systems
How is the capacity of the starting batteries measured?
In cold-cranking amps
Electrical Systems
What part of the electrical system can potentially interfere with another boat system?
Fluorescent lights can interfere with both SSB and VHF
Electrical Systems
How much electricity does a typical cruising boat consume under sail each day?
140 amp hours
Electrical Systems
How is an alternator rated?
In Amp Hours (110 - 150)
Electrical Systems
How much charge does an alternator actually produce?
Charges at less (1/2) than its rating.
Communication
What VHF channel is used for bridge-to-bridge?
13
Communication
What VHF channels are used by VTS?
- 12 international waters
- 14 inland waters
Communication
What is MMSI?
- Maritime Mobile Service Identity
- Registration number for EPIRB and other DSC-enabled radios
- Must be registered with the Search and Rescue authorities prior to proceeding to sea
Communication
What should you do before and after each sail?
- File a float-plan with primary and secondary contacts before cruising
- Advise upon safe arrival.
Diesel Auxiliary
What are the key elements of the fuel system?
- TankShut-off valve
- Electric fuel pump
- Primary fuel filter with water drain valve
- Secondary fuel filter
Diesel Auxiliary
How often should the oil be changed?
After 100-150 hours of cruising
