What is Bottom-Contour Navigation? "Bottom-Contour Navigation used specific bottom-contour charts and sonar to fix a ship’s position. These were very highly measured areas, and we’d run across them several times and fix position with soundings .

Learn how flat, concave, and convex surfboard bottom contours behave while riding a wave. Read which types of boards adopt the multiple underside designs.

Inertial navigation system is an estimated position source, utilizing acceleration, deceleration, and pitch and roll for computing. Bottom contour navigation may be used in areas where detailed hydrographic data has been charted and there is adequate variation in sea floor topography.

This chapter will discuss bottom contours from both perspectives – the physical and theoretical principles of how bottom designs work, along with the cumulative anecdotal feedback from respected surfers and shapers over generations.

Apr 25, 2023 · We explain what concaves, vee, channels, and hulls do on the bottom of your surfboard. It's more complicated than you might imagine.

The basic concept of ‘Bathymetric Contour’ or Bottom Contour (BC) navigation is that the contour is regarded as a position line which can only have been | crossed in one position at one specific time.

There are two main types of surfboard concaves: single concaves and double concaves. Look at the bottom of a single concave surfboard that lies on its bottom on a table, and you’ll see that the stringer line is a bit raised but nearing the rail line; the board is concave towards its bottom.

Nov 27, 2024 · The bottom has a direct impact on your surfboard’s performance, providing different levels of control, speed and manoeuvrability. Here are the 3 most popular categories of surfboard bottom contours, their strengths, weaknesses and ideal conditions: Flat Bottom ‍

The bottom contour of the surfboard is designed to channel water for the purpose of stability, maneuverability, and speed. By directing water flow through the length of the board, the bottom contour will affect the board's performance.

Surfboard Bottom Contours are the particular shaping of the underside of the surfboard. The surface that the water flow will follow. Depending on the design, the water flow direction can be controlled underneath the board and with it, more speed or …