How far can you see?
square root height (factor in heigh of boat above water–freeboard– and you)
so if boat 3 feet above and 6 feet=9 feet= 3nm see
About how long is the mast relative to LOA?
mast usually about 1.5 times LOA
Which is most common sail design?
Sloop (one mast)
Fractional rig if forestay doesn’t attach to top of mast
If we have 2 masts what is smaller mast called?
Mizzen
2 types of split rigs
Ketch (mizzen forward rudder post)
Yawl (mizzen behind rudder post)
2 uses boom vang and when is it most useful
- boom preventer
- introduce twist
most useful downwind
2 forces pushing boat
center effort (CE) center lateral resistance (CLE)
how to determine CE?
how to determine CLE?
CE: draw line all corners sail to other side: intersection is where CE (also consider jib….ultimately CE nearer main)
CLE: keel
For practical purpose who is stronger CLE or CE? what is the typical setup
CLE more forward
CLE usually stronger so pushed boat to wind (weather helm)
How to increased weather helm? (5)
tighten main tighten traveller heel more (have crew sit leeward) ease jib sheet (even remove it!) have more weight in bow (moves CLR forward)
3 sources power for a sail
angle of attack
sail shape
sail twist
2 ways to change angle of attack
trim sails
change course
How do we sail by jib telltales?
it flops where the issue is
(when dealing with sheets go to where issue is: if inside, pull, if outside let out)
if inside (windward) jib telltale luffing: tighten in jib (or helmsman bears off) if leeward (outside) telltale flopping, let jib out or helmsman bears up
How to heave-to?
- Tack but don’t bring jib over. (backwind the jib)
- Let mainsail out a bit. Then push tiller (leeward) basically toward the mainsail as if you’re going back to irons (or turn steering wheel back to the old tack as if you were going back to irons again)
- Wait for equilibrium to happen
How to get out of irons? (2)
- Backing the jib: back jib in one direction (sheet in jib on starboard side…this will cause bow to turn opposite……this will eventually push boat port, allowing you to fill mainsail….now your jib is just backed and you have to switch sheets)
- Push out main: push to where you wanna go…..push tiller in same direction…you will start sailing backwards in that direction.
Bight
loop in a line
Broach
uncontrolled rounding up into wind
by the lee
when wind coming from same side of boat as the boom (bad—danger for gybe)
1 fathom = how many feet?
6
Land Breeze vs Onshore wind?
Land Breeze: comes from land wind (B for beginning)
Onshore Wind: goes to land (W=where you go)
Painter
line attached to bow of dinghy
