CBDR
Radar & Rules of the Road
About
This app trains junior deck officers and watchstanders in essential radar watch skills, including contact evaluation, COLREGS classification, and generating contact reports. It features a live radar scope, generated scenarios for various navigation situations, and drills for recognition and maneuvering.
What's New in CBDR
2.1
September 18, 2026
• Radar explainers: eleven lessons on how radar works, gain, sea and rain clutter controls, range scale, pulse length, interference rejection, refraction and the radar horizon, ducting, diffraction and attenuation, with Bowditch citations. • Radar tuning simulator: adjust gain, STC and FTC on a poor picture and check whether weak returns survive. Illustrative receiver model, no score. • Shiphandling: how a propeller works, how a rudder works, pivot points with a live throttle, and twisting off a pier, on animated three-dimensional illustrations. • MOB recoveries: Anderson, Williamson and racetrack turns, each opened by its use case, with the track drawn for a casualty on either side. • Reduce Motion is respected in the new radar tuning simulator.
MoreFAQ
What is CBDR?
CBDR is an educational application designed to train junior deck officers and watchstanders in core radar watch skills. It covers contact evaluation, COLREGS classification, and contact reporting through interactive simulations and drills.
What learning methodology does CBDR use?
CBDR employs a hands-on approach with a live radar scope, generated scenarios simulating various navigation situations, and specific drills for maneuvering and recognition. It also includes a comprehensive test bank for the USCG Rules of the Road.
How does CBDR track progress?
The app scores spoken or typed contact reports against correct formats, and provides results for offline group testing. This allows users and instructors to assess understanding and identify areas for improvement.
Does CBDR offer certifications?
While CBDR provides a 958-question USCG Rules of the Road test bank and offline group testing with exportable records, it does not explicitly mention offering formal certifications within the app.
Is CBDR suitable for offline use?
Yes, CBDR works entirely offline, making it ideal for training in environments with limited or no internet access. It does not require an account or collect any user data.
What devices does CBDR support?
CBDR is available on iPhone and iPad, indicated by its support for these platforms. It was last updated on August 1, 2026, with version 1.2.
Does CBDR have ads?
No, CBDR is ad-free. The application explicitly states that it contains no ads and collects no user data, ensuring an uninterrupted learning experience.
What is the user sentiment for CBDR?
Based on the available data, CBDR has a perfect 5.0-star rating from 2 reviews, suggesting a highly positive user sentiment among its current users.