Comparisons
Side-by-side decisions, when the answer matters: which credential, which rule set, which prep tool. No fluff — just the rows that actually differ.
Inland Rules vs International COLREGs — Side by Side
Where the US Inland Navigation Rules diverge from the international COLREGs: Rule 9, Rule 10, Rule 24, Rule 28, and Rule 34.
Captain's License vs Boating License — What's the Difference?
A captain's license is a federal commercial credential; a boating license is a state-issued safety certificate. They are not interchangeable.
OUPV vs Master 100 — When to Upgrade
Should you go straight to Master 100 or start with OUPV? Sea-time, exam, vessel-authority, and career-trajectory differences.
CaptainsGround vs Mariners Learning System
How CaptainsGround compares to Mariners Learning System on price, exam authority, content depth, and study tooling.
CaptainsGround vs Bluewater Yachting / In-Person Courses
When an in-person course makes sense vs self-paced citation-backed prep — and how to combine both for the lowest-friction path.