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129 Cards in this Set

  • Front
  • Back

port

left

starboard

right

stern

back

bow

front

aloft

up

below

inside vessel

under

outboard underneath vessel

weatherside

side where wind is blowing (upwind)

leeward

opposite side of weatherside (aka lee; downwind)

headup

turn boat to windward

fall off

turn boat away from wind

athuart

perpendicular to bow and stern

alubber

along the lubber line

lubber line

any line running parallel to keel line (centerboard)

keel

very bottom of boat, foundation

ballast

weight; most keels have this

heel

tipping in response to wind (so ballast helps keep it from tipping over)

list

tip associated with cargo

leeway

slippage of vessel sideways but keels help prevent the "slip to lee"

beam

widest part of ship

length overall (LOA)

total sum of everything

length of waterline (LWL)

water line length

draft

distance from waterline to deepest part of boat

mast

largest pole vertical out of boat

spreader

piece perpendicular sticking out of mast

hull

what creates bouyancy

hull types

displacement, planing

displacement hull

always in water; cannot exceed hull speed and displaces water all the time

planing hull

flat bottom; can go very fast and not restricted to hull speed

theoretical hull speed

how fast a boat can go (although boat can actually go faster sometimes)



squareroot of LWL, multiplied by 1.4 knots

what affects hullspeed/ what is hullspeed

hullshape, good time to reduce power (speed), and formula (squareroot LWL x 1.4 knots)

free board

how much you have left (actual water level to gunnel)

topside

LWL to gunnel

gunnel

point at which water would flow into vessel

types of rigging

standing, running

diff b/e standing and running rigging

standing rigging doesnt move; running rigging does

standing riggings

forestay/jibstay/headstay, shroud, backstay

forestay/jibstay/headstay

piece that runs down from top of mast to bow of boat

shroud

piece of standing rigging that comes down sides making sure mast doesn't tip over; runs over spreader

backstay

permanent and running, top of mast to back of boat

running rigging

halyards, sheets

weather helm

natural tendency to turn windward

lee helm

natural tendency to turn leeward

halyard

used to hoist sail, flag, ladder

sheets

used to control clews (corners) of sail

basic types of sailing vessels

sloop, ketch, yawl, schooner, cutter

sloop

1 mast (jib/mainmast), 2 sails

ketch

2 masts, front mast is bigger, mizzen/after mast sits in front of rudder

yawl

2 masts, front mast is bigger, mizzen/aft mast sits all the way in back and is very dinky and small

schooner

2 masts, smaller mast in front (foremast), larger mast in back (mainmast)

cutter

type of sloop, 1 mast, 3 sails (2 jib/headsails, 1 mainsail) and mast is 40% of way out

sailing vessel sails

jibheaded and gaff headed

jib headed

triangle shape

gaff headed

square shape

jib headed corners

tack- forward corner, clew- aft corner, head- top corner

jib headed sides

foot- bottom side, luff- leading/front edge, leech- trailing edge

gaff headed corners

tack- foward lower corner, clew- aft corner, peak- top corner, throat- forward upper corner

gaff headed sides

luff- leading edge, foot- bottom side, leech- back side, head- top side

where to start when raising sails

back to front (So start with main sail)

sailing positions

beat, close reach, beam reach, broad reach, run

beat

highest point of sail, as close as possible to eye (45 degrees)

beam reach

90 degrees

close reach

between beat and beam (between 45 and 90 degrees)

running

directly downwind (180 degrees)

broad reach

b/e running and beam reach (b/e 90 degrees and 180)

sailing maneuvers

coming about, jibing/gybing

coming about

turning bow toward eye of wind

jibing/gybing

turning stern through eye of windr

eefing

reducing sail size

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

apreventing being in irons

adjust sails if in irons, otherwise, make sure to steer boat with angle, and not directly into wind

tacks

port tack- wind coming from port side


starboard tack- wind coming from starboard side

aerodynamics of sail

bernoulli/venturi effect- explains what makes sails move


newton's 3rd law

1 knot = ? miles/hr

1.15 miles/hr

1 knot per hr = ? ft

6076 ft (1 nautical mile)

1 nautical mile = ? min arc of latitude

1 min arc of latitude

1 degree of latitude = ? nautical miles

60 nautical miles

1 fathom = ? ft

6 ft

1 meter = ? ft

3 ft

mean tide/ average tide

influenced by moon and sun

types of tides

mean low water, low low water (neap tide, see sun and half moon), high water (spring tide)

lateral aids to navigation

daymark, buoy, lights

daymark

"nuns"- red, even numbers, square on right (red right returning)


"cans"- green, odd numbers, triangle on left

red rigth returning

want to be on inside, not outside of red when rerturning

numbering order of daymarks

lowest number is furtherst out to see

buoys

not super good for navigating b/c can move

chart keys for navigation marks

exclamation mark like- fixed to bottom


rhombus shape- not fixed, floating (buoy)


diamond shape- has light

3 characteristics of lights

rhythm, phase, period

rhythm lights

fixed, flashing (off longer than on), occulting (off shorter than on)


phase- groups, ex. 1 or 2 flashes


period- time in sec

magentic compass problems

dont point to true northpole, only gyro compasses do (only used by large boats)

deviation

local disturbance, difference when reading the compasses

variation

global difference b/e the 2 norths

heading

where you are actually steering (b/c can't always be on course)

course

what is charted/laid out, but in reality cannot be maintained

bearing

magnetic position of object relative to you

safety devices required

PFD, radio, flares, fire extinguisher, ?

haling and distress

channel 16

commercial traffic (ships) station

channel 13

coast guard station

channel 22

nomial range

how far you can see the light b/c of its luminosity

definition of position

lattitude and longitude

occult lights

on longer than off

flashing lights

off longer than on

large scale vs small scale chart

large scale- defines small area


small scale- defines big area

depth soundings

taken at low tide (depth is decribed at low tide)

height

measured at high tide, helps us figure out geographic range

spring tides

when earth, sun, moon line up and tides are most extreme

neap tide

when earth, sun, moon not lined up, tides are mellowest

depth measurement

feet, meters, fathoms

sailboat lights

white- bow/stern light (will have 2 if engine)


red- port light (right)


green- starboard light (left)

powerboat/ship

same as sailboat but 2 white lights, one on each end

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)

if see white light

powerboat coming right at you

if 2 white lights line up

it's within 5 miles away

if white that turns off

sailboat

right of way

stand-on vessel, must maintain course and not allowed to change speed

collision bearings

magnetic and relative

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

elative bearing

line mast up to ship and see whether the other ship is moving to the right or left

definition of collision

when bearing is constant

give right of way vessel

give-way vessel, must alter course and speed

3 ways to get hit

crossing, end on end/ head on, overtaking

how to know when to give way

if see red light

end on collisions

neither has right of way; both must turn to starboard, sound horn


overtaking

can't pass if going to impede so must give way


overtaking vessel is always give way

perpendicular boats right of way

boat on right always has right of way

starboard tack right of way

if wind is coming over on starboard side, then is stand on vessel and has the right of way

parallel boats right of way

if on starboard tack, the lower boat has right of way


(downwind ship has right of way)

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