Due to the recent economy, my retirement plans have been put on hold and I find myself renewing my mariners license. My license expires does not expire until August 09. However my radar observer expired at the end of March. To renew, do I need to take the full 5 day radar initial class, or merely just take a 1 day approved renewal course? Hoping to only pay for and lose one day of time to coursework, rather than five.