BulkStem
for Masters and Chief Officers of bulk carriers

Plan the voyage. Know the fuel. Load to the mark.

Fuel on board after every event of the voyage, the critical ROB at the loading port and the maximum cargo you can take to the load line — in one native Mac app that works at sea without internet.

Download for Mac — coming soon

Pilot in testing with working Masters. macOS 26 or newer. Signed release and automatic updates follow the pilot.

Voyage sequence

Sailing legs, port stays, cargo operations and bunkering with consumption profiles per leg, ship time with zone changes, ETA at every point.

Critical ROB

Fuel at arrival, after cargo and at departure of every cargo port, checked against your reserves per grade.

Maximum cargo

Draft limits in metres or feet at any density, departure and arrival points, stowage factor and contract tolerance — the lowest cap governs, with the full deadweight breakdown.

Office-ready report

The bunker calculation in the format operators ask for: distances, speeds, port stays, margins, ROB at every point. Copy as text or export PDF.

BulkStem voyage plan
Voyage plan: events, times in ship time, ROB per grade, critical points and the summary bar.
BulkStem cargo intake
Cargo intake: limiting points, the governing cap and the deadweight breakdown.
BulkStem bunker calculation report
The bunker calculation report, ready to paste into an e-mail to the office.