Head to wind - The bow turned into the wind, sails luffing. This will probably stop the boat and place it .

No-Go-Zone - The boat is pointed too close to the wind for the sails to generate any power (unless they are backed). The sails will be luffing ("flapping") in the breeze and making noise, like a flag.

Close Hauled - Having the sails trimmed for sailing as close to the wind as possible.

Close Reach - This is any upwind angle between Close Hauled and a Beam Reach.

Beam Reach - A point of sail where the ship/boat is sailing at a right angle to the wind.

Broad Reach - A point of sail where the boat is sailing away from the wind, but not directly downwind.

Running - A point of sail, going directly downwind.

Sailing Direction

Windward / Leeward / Port Tack / Fall Off / Starboard Tack

Windward - Upwind

Leeward - Downwind

Port Tack -- Sailing with the wind coming from the port (Left) side, with the boom  on the starboard (Right) side.

Heading Up - Into The Wind

Fall off - To change the boats direction so as to point farther away from where the wind is coming from.

Starboard Tack - A course with the wind coming from starboard (Right) and the boom on the port (Left) side.