KB Skipper Class # 2 Today’s class: It’s a motor, not an engine Charts and Navigation aids Trip planning Hull Speed Hull Speed = 1.34 * SqRt (LWL) LWL = length at water line Charlotte 21.75 = 6.25 knots Rascal 21.75 = 6.25 knots
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Hull Speed = 1.34 * SqRt (LWL)
LWL = length at water line
Charlotte 21.75 = 6.25 knots
Rascal 21.75 = 6.25 knots
Platypus 22.0 = 6.29 knots
Perspicacious 22.25 = 6.32 knots
Passport 40 Sloop, lwl 33.5 = 7.76 knots
Jeanneau 52 sloop lwl 41.67 = 8.65 knots
850 ft Freighter = 37 knots *
The velocity of a wave is equal to its wavelength times its frequency.
With frequency constant, increase the wavelength and you increase the velocity.
How long would it take a container ship to go from barely visible (Edmonds) to right on top of you (Shilshole)?1.34 * Sq Rt (LWL) 12 Nautical Miles / 37 knots = .32 hours = 20 minutes1.34 * SqRt ( 850)1.34 * 28.3 = 37 knots
18 knots = 40 minutes
30 minutes from dock to dock.
17 Knots mid channel
100-yard moving security zone
Corrosion in marine environments occurs when two (or more) dissimilar metals are brought into electrical contact under water.
Mount on propeller shaft
Sweet inboard engines
Exercise: Using outboard motors in the shop, have everyone change out a sheer pin. Go over various engine systems.
Red buoys have even numbers.
Flat Top Pointed Top
Red on right, when you return from the sea
Red = triangleGreen = square
Our #3 Buoy looks like this
Run aground here
5400 Nautical miles from equator to the pole
Latitude: 47° 41′ 57.23″ NLongitude: 122° 31′ 47.25″ W
The WAC Latitude: 47° 38′ 55.18″ NLongitude: 122° 17′ 55.08″ W
Burlington Northern Bridge Clearance 43 feet (13.11 m) at high tide (mean high water of an approximate 10-foot/3.05-m tide)Ballard Bridge Clearance 44 feet (13.72 m) at center span at mean regulated lake level. Closed weekdays 7 - 9 a.m. and 4 - 6 p.m.,Fremont Bridge Clearance 30 feet (9.14 m) at center span at mean regulated lake level. Closed weekdays 7 - 9 a.m. and 4 - 6 p.m., University Bridge Clearance 42 feet 6 inches at center span at mean regulated lake level. Closed weekdays 7 - 9 a.m. and 4 - 6 p.m., Montlake Bridge Clearance 46 feet (14.02 m) at center span at mean regulated lake level. May - August, Closed weekdays 7 - 9 a.m. and 3:30 - 6:30 p.m. September - April, Closed weekdays 7 - 10 a.m. and 3:30 - 7 p.m.,
Morris Code Mo
List all nav aids transiting ship canal from Puget Sound to Lake Union
Locks 1Locks 1Locks 1Locks 1
Exercise: Drag out the charts, arrange on floor from Olympia to Gulf Islands and talk about destinations.