Water-aware planning over official NOAA ENC geometry — land, charted depths, dredged channels, hazards, restrictions and bridge clearances constrain the path; an independent validator then checks every segment. Results are experimental proposals, never approved routes.

Long-press the chart to drop a waypoint there.

Vessel profiles live on this device only — nothing is uploaded or tracked.

Records GPS (raw + filtered) and app events for diagnostics. Stays on this device — delete anytime. On iPhone, recording stops if the phone locks or the app backgrounds.

Units apply to SlipLanding readouts; sounding numbers printed inside NOAA chart tiles are meters (official chart convention).

Safety: SlipLanding is a chart-reference and marina-orientation aid. Voyage planning is experimental and has not been independently validated — always navigate by official charts and judgment. Charted data is NOAA-sourced but may be incomplete or stale.