Block depth = leg average (seafloor, MSL + tide), time = dist ÷ speed
rounded up. Levels = merged depth/time pairs for a deco calculator. Estimates —
verify before diving.
Editing: drag a site to move it ·
click a site to rename or delete · click the map to add one ·
Export copies the list as JSON. Orange = position needs verification.
Bathymetry: CSUMB SFML 1 m (Whalers/Bluefish, 2000–2013) +
NOAA CUDEM 1/9″ topobathy (outer areas), depths in ft below MSL.
Headings magnetic (grid +0.63° conv., −declination).
Disclaimer: This tool is for reference
only. It is built on publicly available data that has not been independently verified.
Plans it produces are for planning purposes and do not account for contingencies
— do not dive beyond your training. Build your navigational knowledge slowly,
and never rely blindly on compass headings: cameras, DPVs, and other electronics
can skew a compass.