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Abaft - behind (on the boat) toward the stern.
Abeam - beside the boat, but not aboard.
Aboard - on a boat.
ABYC - American Boat and Yacht Council
P.O. Box 806 Amityville, N.Y. 11701
Aft - toward the stern of a boat.
Aloft - above the hull; in the air.
Anti-ventilation plate - The horizontal plate just above the prop
(Sometimes called the anti-cavitation plate )
Amidships - near the middle of a boat.
Aqua-Dynamics- no such word (courtesy of Brian Espy)
Astern - behind the boat; to the rear.
Awash - barely floating; mostly submerged. or,( what my boat needs)
Bail - the action of removing water from the hold of bilge of the boat
Ballast - weight in a boat which affects the boats trim.
Beam - greatest width of a boat; the side of a boat.
Below - inside a boat.
Berth - a sleeping area in a boat; or, a place to moor a boat.
BIA - Boating Industry Association ( a part of history)
Bilge - the deepest part of the inside of a boat.
Bilge Rats- boat mechanics
Black Box - Tech talk for ignition module or
Electronic Control Module (ECM)
Also refereed to as, Power Pack and ignition amplifier.
Blister - Used to describe water entry between the gel-coat
and the
fiberglass skin of a boat.
Bow - the front of a boat.
Bow Line - line going forward diagonally from a boat's bow to secure it.
Bow steer - To "over trim" the boat to the point where the nose
of the boat starts
to steer
Breast Line - line going sideways from a boat.
Bridge - upper helm station in some motorboats.
Buoy - floating aid to navigation.
Can - cylinder shaped buoy used for mooring
Capsize - turn upside down or (what increases as your boat gets nicer.)
Cast Iron Genoa- a sail boat's engine
Cavitate- The entry of air into the prop
Chafe - wearing through of a line, sail, etc. from rubbing.
Charge Coil - Voltage generator used to power ignition modules.
(Mostly used on outboards.)
Chart - map of navigable waters.
Chine walk- Dangerously uncontrolled, side to side motion
associated with high speed
operation
Cockpit - outside sitting area in a boat.
Cubic Inch Displacement (CID)- Speed
Current - horizontal movement on water.
Day Beacon -unlighted fixed aid to navigation.
Dead reckoning - Determining your position by distance and course run
Displacement Hull - boat meant to move through the water,
not
skim over it.
Draft - least depth of water needed to allow a boat to clear the bottom.
Drift - speed of a current's flow.
DBWI - Driving a boat while intoxicated
Fairing Block- shim installed to adjust the angle of a mounted item.
Fair Lead - a line unobstructed between its terminals, such as
between a bow chock
and a piling.
Fender - protection for a boat.
Flapper - Short for flapper valve or Shutter valve,installed in the
exhaust system of sterndrive engines to prevent
backwash of water into the engine if the engine were
to shut down unexpectedly.
Forward - toward the bow; ahead.
Freeboard - height of a boat's gunwale above the water .
Fresh water Cooled - An engine that is cooled by anti-freeze
run through a heat exchanger that is
cooled by sea water.
Galley - a boat's kitchen. (Where the term "Galley Slave" came from.)
Gel-Coat - colored, two part plastic finish on fiberglass boats.
Gimbal bearing- drive shaft support bearing located in the gimbal housing.
Gimbal housing- supporting part of the sterndrive, bolted to the transom
Gimbal ring - part of the sterndrive that looks like a horse collar
and supports
the sterndrive and allows it to swivel
Ground Tackle - gear used for anchoring.
Gunwale - the top edge of a boat's hull.
GWL - gunwale length
Hatch - window mounted horizontally in the cabin roof.
Head - a boat's toilet; or the top corner of the sail.
Headstay - wire from the bow to the upper part of a sailboat's mast.
Heel - sideways learning of a boat due to the wind.
HEI - High energy Ignition
Helm - a boat's steering area; also the steering gear.
High Water - the tide's highest point before it starts to fall.
Hull - a boat's bottom shell.
Hull Speed - theoretical top speed for a displacement boat. (sailboat)
Knot - nautical mile (6,076 ft.) per hour ( a measure of speed).
Lee of the Land - near a shore which provides protection
from wind and waves.
Lee Shore - land downwind of a boat.
Leeward - downwind; away from the source of wind.
Leeway - boat's sideways movement through the water, due to the wind pushing it to
leeward.
List - sideways tilt of a boat due to poor boat trim.
LOA - length overall, centerline length of hull including
molded in pulpits and platforms
Make Way - to propel yourself through the water.
(What some boat mechanics do at the singles bar.)
Mooring - a place to secure a boat in the water.
MPI - Multi-port-Injection, as compared to,
EFI - Electronic fuel
Injectors, or
TBI - Throttlebody Injection
MSD - Marine Sanitary Device
Nautical Mile - 6076 feet; 1.15 statute miles.
Nun buoy- shaped like a rocket's nose cone.
NMMA - National Marine Manufacturers Association
Petcock - often used to describe the sea water drain valves
an inboard motor
Porpoise (porpoising) the rhythmic bouncing of the nose of a
planing boat, often caused by
over-trim or hull irregularities
Port - "window" on a boat.
Port Side - a boat's left side.
Port (to) - by a boat's left side.
Prop wash- The intersection of water, behind the boat,
initially displaced by hull movement through
the water.
Quarter - side of a boat abaft the beam.
Rectifier - In outboard motors, this item converts alternating
current (AC) to direct current (DC).
Rode - line (chain or fiber) which joins an anchor to an anchored boat.
Rudder - flat board which redirects (aims) current or propeller
wash to steer a boat.
Running Lights - lights to be displayed by a boat underway
at night or in restricted visibility.
Scope - ratio of anchor rode length to vertical distance from the
anchor lead (chock or roller) to the
bottom.
Scupper - water drain hole in the deck of a boat.
Sidelights - a boat's red and green lights.
Shift Interrupter - pressure sensitive switch used to electronically
slow the engine down when shifting gears.
Slack Water - the moment when a tidal current changes direction.
Sole - a boat's floor.
Spar - a type of buoy.
Splash-well - The pan area just in front of the transom on
outboard boats that helps keep back-wash
from entering the cockpit area.
Spring Line - line secured neat amidships and led ashore mostly
forward or aft, to
keep a boat from surging ahead or astern.
SSB - Single Side Band Radio (often a new option on VHF radios )
Stand Tide - the moment the tide changes direction up or down.
Starboard - on or along a boat's right side.
Starboard Side - a boat's right side.
Stern - a boat's back end.
Stern Light - white light which shows abaft a boat underway at night.
Stern Line - line leading diagonally aft from the stern to secure a boat.
Sternway - boat's backward movement through the water or over the bottom.
Stringer - the internal hull bottom ribs used for structure
Stringer mount- Often used to describe early vintage OMC
sterndrive engine packages.
Strake- contour added to the outside hull bottom, to aid in performance
Swamp - to fill with water.
TCW - twin cycle, water cooled (as in TCW II and TCW 3 oils)
Tidal Current - horizontal flow of water due to the gravity of the
moon and the sun.
Tidal Range - how far the tide rises and falls.
Tide - vertical movement of water die to gravity of the moon and the sun.
Tiller - handle attached to the rudder, used to steer some boats.
TnT - Power Trim n Tilt
Transom - the outside flat part of a boat's stern.
Trigger - The electronic switch that replaced points.
Often
refereed to as a Trigger assembly.
Trim - fore and aft and side to side balance of a boat.
Trim fin - Small fin mounted to the gearcase that helps
reduce steering torque.
Trim tab - Flat horizontal adjustable plate mounted to the transom that
helps adjust bow up and bow down angle
True Bearing - Bearing or direction taken relative to true North
Vertical Drive - often used to describe the inboard outboard sterndrive.
Wake - waves made by a boat's movement through the water.
( the disturbance
your wife makes
when you tell her your going boating.)
Walter Drive - V drive inboard transmission
Windward - toward or into the source of the wind.
WLL - water line length
Yard Arm -
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