Know Your Waters: Charts, Marks, and Rules
Treat charts like living guides. Check scale, soundings, datums, and caution notes; compare GPS position to charted hazards; and update with Notices to Mariners. One reader avoided a nasty shoal after spotting a small magenta “rocks awash” symbol—share your close calls too.
Know Your Waters: Charts, Marks, and Rules
Remember buoyage systems differ: IALA B (North America) means red, right, returning; IALA A is the opposite. Confirm shapes, topmarks, and light characteristics, especially near inlets where shoals shift. Snap a photo of confusing marks, post it, and we’ll help decode it together.