Observed arrival · 2026-10-09

Sumner’s bridge tools

sumnermarine.com Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A browser-based maritime toolkit for compass error, passage planning, GMDSS, MARPOL, and watchkeeping.

Landing page captured for the 2026-10-09 issue.

For: Mariners handling bridge and watchkeeping tasks
Worth noticing: Its variation guidance explains how ECDIS’s negative values map to westward change, with a worked 4°W example.

Field notes

The Bridge section offers visible panels for compass error, route planning, GMDSS, MARPOL, and watchkeeping, with readiness labels ranging from “Ready” to “Part built.” For compass error, users can enter chart variation and course manually or supply a chart/ECDIS photo; deviation-card text can also be pasted after scanning with phone tools such as Google Lens or iPhone Live Text. The site says saved information remains in the current browser and device.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Are You Scared?

420,208 arrived 1,000 judged 984 catalogued Enter the complete issue