Tools

Calculators and utilities built for practical, real-world use.

Lat/Long Coordinate Converter

Convert between coordinate formats: DD, DDM, DMS, BNG, and MGRS. Essential for navigation, mapping, and position reporting.

DD/DDM/DMSBNG/MGRSGPS Formats

Speed Distance Time Calculator

Calculate speed, distance, or time for maritime navigation. Essential for passage planning, ETA calculations, and fuel consumption estimates.

Speed CalculationsDistance PlanningETA Estimates

Vertical Clearance Calculator

Calculate safe passage under bridges and overhead obstacles. Account for tide heights, vessel air draft, and safety margins.

Bridge ClearanceTide CalculationsSafety Margins

Course to Steer Calculator

Calculate the compass course to steer accounting for current, wind, and compass variations. Essential for accurate navigation.

Course CorrectionsCurrent & WindCompass Deviation