Channel Craft Rhumb Line is a two-player abstract strategy board game by Martin H. Samuel, played with glass pieces on mousepad-type material, using placement and point accumulation to win.
Rhumb Line II is a 50-page note pad travel version played with a blue and a yellow pen.
[2] The goal of the game is to out-navigate the opposition and achieve victory by placing nuggets on the board to build and/or block point-scoring "rhumb line" combinations of radii, arcs and spirals.
[2] The Rhumb Line game board consists of a compass rose with 32 marked points with a score-keeping "ladder" on either end.
Officer (yellow) starts and players take turns placing their pieces, one at a time, on any empty point, building on those already on the board, to complete and/or block point-scoring combinations.