The plotter position looks precise, but depth and visual marks disagree. What is the safest role for the electronics?
Short answer
Use it as one understood aid, protect the boat, and cross-check the mismatch with independent evidence
Electronic navigation supports planning and monitoring, but apparent precision is not proof. When important cues conflict, maintain lookout and control, create margin, then compare the source, settings and route with genuinely different position, depth, visual and time evidence. Revise Electronics as Support.
Sources and scope
Reviewed by Richard Moore on . This answer is scoped to united kingdom and general recreational seamanship; check the current chart, publication, local rules and official operational guidance before acting afloat.
Quick check
The plotter position looks precise, but depth and visual marks disagree. What is the safest role for the electronics?