VHF radio procedure, sound and light signals, and why marine communication is built around strict, unambiguous formats rather than natural conversation.

The emergency procedures Day Skipper drills hardest, and why the course treats rehearsed response over improvised heroics.

The handful of knots and the underlying principles that make docking and anchoring predictable instead of improvised.

How the course ties together three separate moving systems — wind, tide, and current — into the single practical question of what the water will actually do to your boat.

How marine radar builds a picture out of nothing you can see, and the discipline needed to trust it in fog, at night, or in busy traffic.

How echo sounders actually work, and how the same instrument the course teaches for depth safety doubles as a fish-finder on the water.

What a nautical chart is actually encoding, and how to turn chart symbols into a position and a course you can trust.

A walk through a small cruising boat's core systems — hull, rig, engine, and the systems that keep them all talking to each other.

How LLM architecture evolved from RNNs to Transformers to Mixture of Experts, told as a chain of problems and fixes, with one example sentence carried through every stage.

Notes from completing the Day Skipper sailing course — working through chartwork, compass theory, tides, and collision regulations as a new blog category.