MMC Renewal Class
MMC Renewal Class is for mariners that do not have the sea time to renew their license. In short, renewal requires 360-days in the past five-years. If you have this time great. However, if you do not have the time, than ColPac Maritime School can help you keep your license. These classes are scheduled any day the school is open, seven-days a week. Call 503-841-6066 to schedule a renewal class.
Consequently, the Radar Observer also expires every 5-years with the MMC. And likewise, if you can document 360-days of time on radar equipped vessels you can renew Radar without taking a course. (Reference: 46 CFR 11.480 (g)). Note that failure to renew the Radar Observer will result in removal of the license from your MMC book.
The License Refresher class: 1-day and $200
This class will renew an OUPV, OR Master or Mate 25, 50, 100, or 200-ton license. In short, the class is in two parts. Firstly: a review of the Rules of the Road followed by an open-book exam. Secondly: a review of Navigation General, Deck General, and Safety followed by an open-book exam of these general subjects.
The Radar Renewal Class: 1-day and $200.
This class will renew any Radar Observer. In short, it provides a quick review and exam on the subject of collision avoidance plotting.
Refresh your plotting skills by using this 
Related Stuff
In short, the MMC is valid for 5-years. You can renew any time before it expires, or within one year after. If you can document 360-days of sea time in the past 5-years can renew without taking a class.
Lastly, as an alternative to taking a class or letting your license expire, you can request an open book exam to renew. MORE >>