Calculate cargo weight from 6 draft readings. Includes Quarter Mean formula, trim corrections, density correction, and a complete step-by-step worked example. Save initial/final surveys with localStorage. Print-ready reports.
Open Calculator →Interactive visual simulator for reading ship draft marks. Metric (decimeter) and imperial (feet/inches) systems side-by-side. Includes challenge mode with scoring to test your reading accuracy.
Open Simulator →Compare 51 real vessels by draft, type, and specifications. Sortable and filterable table with draft range bar charts. Compare up to 3 vessels side-by-side. Data from classification society records.
Open Comparison →All tools are free to use. No registration, no data collection. Calculations run entirely in your browser.
Need professional measurement equipment?
Contact GOTEC Explore Products