apps / 1602390396
Master-Nav
Peterjohn Chisholm · Education · $1.99 · US storefront
- rating
- 4.7 ★
- ratings
- 94
- updated
- Jun 15, 2026
- released
- Jan 8, 2022
v1.50
visible word pool · 2 words
title 10/30 chars · subtitle unavailable
App Store search indexes the title and subtitle together with the hidden 100-character keyword field as one combined pool: any phrase assembled from those words can rank. These are the words of Master-Nav's pool that are public — the keyword field is not exposed by any API.
from the listing
Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The COLREGS are notoriously difficult to learn and retain — Master-Nav makes it significantly easier through an interactive system built around how your brain actually works. Instead of guessing through random question banks, Master-Nav guides you step by step through every rule from start to finish. Wrong answers are revisited until the rules stick — properly. Complex regulations are broken…
latest US reviews
★★★★★
Great app but could be better
Great app. Please make distinction of inland/international more apparent. Also, when completing every rule please allow for resetting the progress so that I can go back and “learn.” After I finished everything there was a window congratulating me on getting through everything but…
— Brando.g88
★★★★★
Great Refresher and Prep Tool
I’m getting ready to start training for my next assignment on a ship. This is an easy to use tool. I was just looking for the COLREGS test questions, but the Review modules are extremely helpful. It’s like having a high level Maritime Rules of the Road instructor on your phone.
— SWO4Life
★★★★★
Great for SWOs going to BDOC
I couldn’t just read COLREGS and make it stick to my brain for sheee, thank god for this app and the creators of this dynamic way of memorizing rule by rule. Because if your going to be navigating a multi million-billion dollar ship make sure you have this memorized to the T!
— Youngchepe
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