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129 Cards in this Set
- Front
- Back
port |
left |
|
starboard |
right |
|
stern |
back |
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bow |
front |
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aloft |
up |
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below |
inside vessel |
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under |
outboard underneath vessel |
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weatherside |
side where wind is blowing (upwind) |
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leeward |
opposite side of weatherside (aka lee; downwind) |
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headup |
turn boat to windward |
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fall off |
turn boat away from wind |
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athuart |
perpendicular to bow and stern |
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alubber |
along the lubber line |
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lubber line |
any line running parallel to keel line (centerboard) |
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keel |
very bottom of boat, foundation |
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ballast |
weight; most keels have this |
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heel |
tipping in response to wind (so ballast helps keep it from tipping over) |
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list |
tip associated with cargo |
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leeway |
slippage of vessel sideways but keels help prevent the "slip to lee" |
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beam |
widest part of ship |
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length overall (LOA) |
total sum of everything |
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length of waterline (LWL) |
water line length |
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draft |
distance from waterline to deepest part of boat |
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mast |
largest pole vertical out of boat |
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spreader |
piece perpendicular sticking out of mast |
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hull |
what creates bouyancy |
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hull types |
displacement, planing |
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displacement hull |
always in water; cannot exceed hull speed and displaces water all the time |
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planing hull |
flat bottom; can go very fast and not restricted to hull speed |
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theoretical hull speed |
how fast a boat can go (although boat can actually go faster sometimes)
squareroot of LWL, multiplied by 1.4 knots |
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what affects hullspeed/ what is hullspeed |
hullshape, good time to reduce power (speed), and formula (squareroot LWL x 1.4 knots) |
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free board |
how much you have left (actual water level to gunnel) |
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topside |
LWL to gunnel |
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gunnel |
point at which water would flow into vessel |
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types of rigging |
standing, running |
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diff b/e standing and running rigging |
standing rigging doesnt move; running rigging does |
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standing riggings |
forestay/jibstay/headstay, shroud, backstay |
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forestay/jibstay/headstay |
piece that runs down from top of mast to bow of boat |
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shroud |
piece of standing rigging that comes down sides making sure mast doesn't tip over; runs over spreader |
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backstay |
permanent and running, top of mast to back of boat |
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running rigging |
halyards, sheets |
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weather helm |
natural tendency to turn windward |
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lee helm |
natural tendency to turn leeward |
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halyard |
used to hoist sail, flag, ladder |
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sheets |
used to control clews (corners) of sail |
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basic types of sailing vessels |
sloop, ketch, yawl, schooner, cutter |
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sloop |
1 mast (jib/mainmast), 2 sails |
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ketch |
2 masts, front mast is bigger, mizzen/after mast sits in front of rudder |
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yawl |
2 masts, front mast is bigger, mizzen/aft mast sits all the way in back and is very dinky and small |
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schooner |
2 masts, smaller mast in front (foremast), larger mast in back (mainmast) |
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cutter |
type of sloop, 1 mast, 3 sails (2 jib/headsails, 1 mainsail) and mast is 40% of way out |
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sailing vessel sails |
jibheaded and gaff headed |
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jib headed |
triangle shape |
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gaff headed |
square shape |
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jib headed corners |
tack- forward corner, clew- aft corner, head- top corner |
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jib headed sides |
foot- bottom side, luff- leading/front edge, leech- trailing edge |
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gaff headed corners |
tack- foward lower corner, clew- aft corner, peak- top corner, throat- forward upper corner |
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gaff headed sides |
luff- leading edge, foot- bottom side, leech- back side, head- top side |
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where to start when raising sails |
back to front (So start with main sail) |
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sailing positions |
beat, close reach, beam reach, broad reach, run |
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beat |
highest point of sail, as close as possible to eye (45 degrees) |
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beam reach |
90 degrees |
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close reach |
between beat and beam (between 45 and 90 degrees) |
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running |
directly downwind (180 degrees) |
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broad reach |
b/e running and beam reach (b/e 90 degrees and 180) |
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sailing maneuvers |
coming about, jibing/gybing |
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coming about |
turning bow toward eye of wind |
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jibing/gybing |
turning stern through eye of windr |
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eefing |
reducing sail size |
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problem of being in irons |
when sail is pointed into wind, is locked down, so boat is probably not going anywhere irons is 0 degrees orientation |
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apreventing being in irons |
adjust sails if in irons, otherwise, make sure to steer boat with angle, and not directly into wind |
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tacks |
port tack- wind coming from port side starboard tack- wind coming from starboard side |
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aerodynamics of sail |
bernoulli/venturi effect- explains what makes sails move newton's 3rd law |
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1 knot = ? miles/hr |
1.15 miles/hr |
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1 knot per hr = ? ft |
6076 ft (1 nautical mile) |
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1 nautical mile = ? min arc of latitude |
1 min arc of latitude |
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1 degree of latitude = ? nautical miles |
60 nautical miles |
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1 fathom = ? ft |
6 ft |
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1 meter = ? ft |
3 ft |
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mean tide/ average tide |
influenced by moon and sun |
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types of tides |
mean low water, low low water (neap tide, see sun and half moon), high water (spring tide) |
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lateral aids to navigation |
daymark, buoy, lights |
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daymark |
"nuns"- red, even numbers, square on right (red right returning) "cans"- green, odd numbers, triangle on left |
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red rigth returning |
want to be on inside, not outside of red when rerturning |
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numbering order of daymarks |
lowest number is furtherst out to see |
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buoys |
not super good for navigating b/c can move |
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chart keys for navigation marks |
exclamation mark like- fixed to bottom rhombus shape- not fixed, floating (buoy) diamond shape- has light |
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3 characteristics of lights |
rhythm, phase, period |
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rhythm lights |
fixed, flashing (off longer than on), occulting (off shorter than on) phase- groups, ex. 1 or 2 flashes period- time in sec |
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magentic compass problems |
dont point to true northpole, only gyro compasses do (only used by large boats) |
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deviation |
local disturbance, difference when reading the compasses |
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variation |
global difference b/e the 2 norths |
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heading |
where you are actually steering (b/c can't always be on course) |
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course |
what is charted/laid out, but in reality cannot be maintained |
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bearing |
magnetic position of object relative to you |
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safety devices required |
PFD, radio, flares, fire extinguisher, ? |
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haling and distress |
channel 16 |
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commercial traffic (ships) station |
channel 13 |
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coast guard station |
channel 22 |
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nomial range |
how far you can see the light b/c of its luminosity |
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definition of position |
lattitude and longitude |
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occult lights |
on longer than off |
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flashing lights |
off longer than on |
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large scale vs small scale chart |
large scale- defines small area small scale- defines big area |
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depth soundings |
taken at low tide (depth is decribed at low tide) |
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height |
measured at high tide, helps us figure out geographic range |
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spring tides |
when earth, sun, moon line up and tides are most extreme |
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neap tide |
when earth, sun, moon not lined up, tides are mellowest |
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depth measurement |
feet, meters, fathoms |
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sailboat lights |
white- bow/stern light (will have 2 if engine) red- port light (right) green- starboard light (left) |
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powerboat/ship |
same as sailboat but 2 white lights, one on each end |
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if see red and green (and white) lights |
danger, running right at you (either sailboat if no white, and ship if white, less than 5 miles away) |
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if see white light |
powerboat coming right at you |
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if 2 white lights line up |
it's within 5 miles away |
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if white that turns off |
sailboat |
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right of way |
stand-on vessel, must maintain course and not allowed to change speed |
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collision bearings |
magnetic and relative |
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magnetic bearing |
compass- if degree/bearing increases, then other ship is going faster than you if it decreases, it's going slower than you if same, then collision |
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elative bearing |
line mast up to ship and see whether the other ship is moving to the right or left |
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definition of collision |
when bearing is constant |
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give right of way vessel |
give-way vessel, must alter course and speed |
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3 ways to get hit |
crossing, end on end/ head on, overtaking |
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how to know when to give way |
if see red light |
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end on collisions |
neither has right of way; both must turn to starboard, sound horn
|
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overtaking |
can't pass if going to impede so must give way overtaking vessel is always give way |
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perpendicular boats right of way |
boat on right always has right of way |
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starboard tack right of way |
if wind is coming over on starboard side, then is stand on vessel and has the right of way |
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parallel boats right of way |
if on starboard tack, the lower boat has right of way (downwind ship has right of way) |
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saill boat taking over powerboat right of way |
powerboat stands on b/c boat overtaking is responsible for avoiding collision and the power of the boat is irrelevant |