Learn how to renew your Radar Observer on a USCG license. Submit 360 sea days or take a course. Know the steps and requirements.
You need to submit documentation of 360 sea days in the last 5 years that say verbatim that you "carried out Bridge Watch duties in a position that routinely uses radar for navigation and collision avoidance purposes."

If you cannot produce the documentation of seatime while using radar, you will need to take an original, refresher, or recertification Radar Observer course or have taught an original, refresher, or recertification Radar Observer course twice in the last 5 years.
If you routinely used a radar on vessels less than 200 GRT and you used a CG-719S (Small Vessel Sea Service Form) You will need a separate memo on official letterhead signed by the captain, owner or vessel manager which states the start date and the end date of your service as well as the following statement:
“YOUR NAME carried out Bridge Watch duties in a position that routinely uses radar for navigation and collision avoidance purposes."
If you own your boat you can complete the memo for yourself and it does not need to be on letterhead.
For large commercial vessels you will be issued a CG-718A (Certificate of Discharge Form). This is issued from the ship's master every time you depart the vessel.
If your CG-718A (Certificate of Discharge Form) has you in a role that traditionally uses radar such as any Mate or Master you do not need to do anything else to document your time routinely using radar for navigation and collision avoidance purposes.
For all other vessels you will be issued a Sea Service Letter on Company letterhead that exactly follows 46 CFR 10.232. These can be issued from the ship’s master, owner, vessel manager or office staff.
If you routinely using radar for navigation and collision avoidance purposes, you need to make sure your sea service letter includes the following statement:
“YOUR NAME carried out Bridge Watch duties in a position that routinely uses radar for navigation and collision avoidance purposes."

We hope this made your life a little easier and if you have other questions the MM-SEAS team is always here to help!
MM-SEAS is free to use on your own and if you need some more personalized help you can upgrade to MM-SEAS Expert Access inside of the site.
For complete guidance on renewing your MMC, check out:
Start with the Ultimate USCG License Renewal Checklist for a complete overview of the renewal process.
No matter what, when you are ready to submit your application you can do it yourself, or you can hand the whole thing to us. An MM-SEAS Navita Navigator walks you through submitting in Navita, the Coast Guard's new submission portal, on a short video call. No computer, or not up for a video call? Our team gets your application submitted to the Coast Guard for you anyway. A Stress-Free MMC is $399. Two MM-SEAS licensing experts check every page, we pay your Coast Guard fees at submission and charge your card so you never touch pay.gov, and we stay on it with the National Maritime Center until your credential is issued.
MM-SEAS Expert Access is $99 a year. It is your personal guidance counselor for USCG licensing: what training you need next, which sea time counts, and how to reach the credential you want, by phone, email, chat or a 1 on 1 video call. Expert Access members also get $50 off a Stress-Free MMC.
Nate Gilman is President and Co-Founder of MM-SEAS. He hawsepiped from the deck to a 3rd Mate Unlimited license with full STCW compliance over more than 15 years at sea, and is a veteran of the NOAA Commissioned Corps. He works directly with the National Maritime Center, USCG-approved training schools, and vessel operators on credentialing policy, and writes on sea service documentation, evaluation standards, and how mariners move up the license ladder.