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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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kb skipper class 2
KB Skipper Class # 2
  • Today’s class:
  • It’s a motor, not an engine
  • Charts and Navigation aids
  • Trip planning
hull speed
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

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 *

wave of translation
Wave of Translation

The velocity of a wave is equal to its wavelength times its frequency.

With frequency constant, increase the wavelength and you increase the velocity.

1 34 sq rt lwl 12 nautical miles 37 knots 32 hours 20 minutes 1 34 sqrt 850 1 34 28 3 37 knots

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

ZIM Djibouti

ferries are fast
Ferries are Fast

30 minutes from dock to dock.

17 Knots mid channel

MV Tacoma

100-yard moving security zone

electrolysis
Electrolysis

Corrosion in marine environments occurs when two (or more) dissimilar metals are brought into electrical contact under water.

sacrificial zinc anode

Sacrificial Zinc Anode

Mount on propeller shaft

prop shaft zinc anode
Prop Shaft Zinc Anode
  • Electrical contact is essential –
  • Metal to metal.
inboard engines
Inboard Engines
  • Sacrificial zinc needed in cooling system.
  • Salt water acts as electrolyte
damn outboard motors
Damn outboard motors ……

Sweet inboard engines

changing the shear pin
Changing the Shear Pin

Exercise: Using outboard motors in the shop, have everyone change out a sheer pin. Go over various engine systems.

all buoys float

All buoys float

Red buoys have even numbers.

can nun
Can Nun

Flat Top Pointed Top

Red on right, when you return from the sea

day marks
Day Marks

Red = triangleGreen = square

noaa chart 1
NOAA Chart #1

Our #3 Buoy looks like this

phase characteristics of lighted buoys
Phase Characteristics of lighted buoys
  • Fixed
  • Flashing
  • Quick Flashing
  • Alternating
slide22

Tortilla Flats

Run aground here

eagle harbor all lit up
Eagle Harbor- all lit up!
  • Decatur Reef R “2” fl R 6s
  • Blakely Rock fl 4 s 16ft 5M
  • Tyee Shoal Fl (2+1) R 6s 15ft 5 MHORN (bl 15s)
  • R N “2”
  • Fl G 6s 30 ft 4M “1”
  • Fl G 2.5s 15ft 5 M “3” 1Bell
  • Fl R 4s 15ft 4M “4”
  • Fl G 4s “5”
slide30
Equally spaced0 to 90 degrees60 Minutes to each degree60 seconds to each minuteEach minute is one nautical mile

5400 Nautical miles from equator to the pole

port madison
Port Madison

Latitude: 47° 41′ 57.23″ NLongitude: 122° 31′ 47.25″ W

The WAC Latitude: 47° 38′ 55.18″ NLongitude: 122° 17′ 55.08″ W

charts
Charts
  • Feet or meters or fathoms
  • Chart number
  • Mean Lower Low Water – depth references
  • Compass Rose
  • Special areas – traffic lanes, restricted areas
  • Scale: 1:8,0000 is large
  • 1:40,000 better
  • 1:8000 harbor chart
lake washington ship canal
Lake Washington ship Canal

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.,

exercise
Exercise

Morris Code Mo

List all nav aids transiting ship canal from Puget Sound to Lake Union

slide41
Ballard Locks – 4 knot speed limit
    • Waiting for the locks
      • Fenders on both sides
      • 50 ft. lock lines ready
      • Tie to bulkhead or not
      • Practice the lasso
      • Do not get off the boat
      • Red light = no Green light = ready for boats to enter
      • Large boats first
      • Listen for announcement
    • Large Locks
      • If you are on the wall, how to handle the 50 ft lock lines
      • Do not tie across to a boat on the other side.
      • You will most likely be rafting up to a larger boat.
    • Small Locks
      • The attendant will tell you what number bollard to take.
      • Floating bollards – practice the lasso
    • In the locks
      • Fend off carefully – do not risk hands or feet to injury
      • Lake line secured first
      • Run line to cleat on boat you raft too then back – so you control the release
      • Cleat all lines
      • Watch sailboat mast locations.
      • Keep crew from rocking the boat.
    • Exiting the locks
      • Start engine before lock opens
      • Pay attention to lock attendant
      • Remove lake line last.
      • With current, boat must have way on her for rudder to bite.
      • If out of control, do not injure crew, boat will flush out of locks on her own.
      • Get out of the way of other boats coming out of the locks
hiram m chittenden locks
Hiram M. Chittenden Locks

LakeLineLast

Locks 1Locks 1Locks 1Locks 1

shilshole
Shilshole
  • Shilshole Marina
  • Pump out and Gas dock locations
  • Range markers for approaching channel in the dark.
  • Nun buoys and shallow water hazards in the area.
  • Get out of the channel before raising/lowering sails
trip planning
Trip Planning

Exercise: Drag out the charts, arrange on floor from Olympia to Gulf Islands and talk about destinations.