1) Garboard plank 2) Garboard strake 3) Strake 4) Wale 
The strake closest to the keel (from Dutch gaarboard).
The strake closest to the keel (from Dutch gaarboard).
plank on a ship's bottom next to the keel
plank on a ship
• (n.) One of the planks next the keel on the outside, which form a garboard strake.
The lowest planks or strakes which adjoining the keel.
The lowest part of a hull next to the keel. The planks each side of the keel are the 'garboard strakes'. 
Gar'board noun (Nautical) One of the planks next the keel on the outside, which form a garboard strake. Garboard strake or streak , 
The plank adjoining the keel. Also called garboard strake. Garboard drain plugs are installed in the at the lowest point along the garboard. 
Garboard is a nautical term for the bottommost plank of a vessel's hull. It is also called the garboard plank or garboard strake.
Used in conjunction with strake. Refers to the planks, or strakes, on either side of and adjacent to the keel.
The strake closest to the keel (from Dutch gaarboard).
[n] - the first wale laid next to the keel of a wooden ship
garboard plank noun the first wale laid next to the keel of a wooden ship