Boat Crew Quals Flashcards
List survival procedures in event of boat capsizing
- Locate nearest exit to open water
- Inventory survival gear
- Select best swimmer to exit first carrying line
- First swimmer exits with PFD in hand if necessary
- Swimmer contacts crew inside by tapping on hull of boat
- Rest of crew exits one at a time, second best swimmer going last
- Activate PLB/EPIRB and stay with the boat until rescued or it sinks
BCM 02-16
List survival procedures in event of boat capsize
Egress routes in order of precedence Identify nearest exit to open water Inventory survival gear Best swimmer exits first with line Tap hull to contact crew inside Rest of crew exits one at a time Activate EPIRB/PLB & stay with boat
State the two primary forces that affect a boat’s stability
Weight and buoyancy
Define buoyancy
Upward force of water displaced by the hull
Define center of gravity and describe how it changes as weight is added or subtracted on the boat
Point where boat’s weight acts vertically downwards. When weight is added the center of gravity moves towards the weight, when it’s subtracted the center moves away
State the two types of stability
Longitudinal and transverse
Describe the two types of forces that affect stability
Static - placement of weight within the hull
Dynamic - actions outside hull (wind and waves)
Define equilibrium and describe how it changes during rolling, heeling, and listing
Equilibrium - when the center of buoyancy acting upwards is below the center of gravity acting downwards
Rolling - center gravity moves in same direction as roll, side-to-side motion
Heeling - center of buoyancy moves towards lower side and vertical centerline rights the boat, temporary leaning
Listing - boat heels to correct equilibrium, permanent leaning
List the general boat design features that influence stability
- Size and shape of hull
- Draft of the boat
- Trim (angle at which vessel rides)
- Displacement
- Freeboard
- Superstructure size, shape, weight
- Non-watertight openings
Identify:
- Short blast
- Prolonged blast
- Danger signal
- Coming to port
- Whistle signal for sailing vessels during periods of reduced visibility
- 1 second blast
- 4-6 second blast
- 5 or more short rapid blasts
- Two short blasts
- 1 prolonged and 2 short blasts at 2 minute intervals
Identify and describe maritime distress signals
Radio: 1. May-Day 2. Radio telephone alarm 3. Radio telegraph alarm 4. S. O. S. Fire: 5. Red star shells 6. Orange smoke 7. Dye marker 8. Red parachute flare 9. Flames on vessel 10. Gun fired at one minute intervals Flags 11. November over Charlie 12. Square over ball 13. Orange background, black square over black ball Misc 14. Continuous sounding fog horn 15. Person waving 16. High intensity strobe (50-70 fpm) 17. EPIRB/PLB EMERGENCY POSITION INDICATING RADIO BEACON PERSONAL LOCATOR BEACON
Name and define the three basic types of hulls
- Displacement (slow) - displaces water
- Semi-displacement (medium) - displaces water up to a certain speed, then semi-planes
- Planing (fast) - skims the water
Define keel and name the two keel types
Backbone of the boat. Bar keel (stiffeners) and flat keel (“I” beam)
Name the parts of doors and hatches that are used to make them watertight
Rubber gaskets, knife edges, dogs, handles. Apply pressure.
Name and define measurements used to define boat displacement
From waterline to bottom of boat - displacement tons
