Sharpitor

A 3D sim to help you master the right of way essentials:Rule A. Approach on different tacks - Port tack shall give wayRule B. Approach on the same tac …

Munich/Vienna tuning systems NB requires headphones with a good frequency range免費玩Zither Tuner APP玩免費免費玩Zither Tuner AppZither Tuner APP LOGOZither Tu …

Familiarizaton with the 58 stars listed in the nautical almanac is a great way to begin finding your way around the celestial sphere. Here the '58 …

An abridged celestial viewer for the navigational stars and their constellations, featuring two learning modes.'Recognize' mode randomly highl …