Mariner's Draft Survey is a professional tool for ship's officers to calculate cargo quantities during draft surveys on bulk carriers — replacing paper worksheets and error-prone manual arithmetic. From the six drafts to the final cargo figure, it shows the working behind every number. No ads, no tracking, and it works fully offline.
Everything in one place
From the drafts to the final cargo figure — with the working behind every number.
Six-point draft entry
Forward, midship, aft — port & starboard — with a clear visual ship diagram.
Automatic corrections
Mean of means, trim and list corrections handled for you.
Hydrostatic interpolation
Precise interpolation from your own vessel's tables.
Deductibles & density
Sounding tables for ballast, fresh water, fuel and more, plus dock-water density.
Net cargo by difference
Light ship and constant handling for the final cargo figure.
Show your work
Tap any result to see the exact formula and the numbers behind it.
Vessels & history
Import tables from Excel/CSV, save vessel profiles, keep a full survey history.
Clean PDF reports
Export professional reports ready to hand over.
Works anywhere
100% offline. No ads, no tracking, no sign-up — no data leaves your device.