| October 2002
||Coast Guard awards contracts to three vendors to produce a test boat of each design for phase 1.
| October 2003
||Phase 1 is completed with delivery of test boats to the Coast Guard.
| June 21, 2006
||After evaluating the test boats, the service selected and awarded phase 2 of the contract to Marinette Marine Corp. of Marinette, Wisconsin, for construction of up to 250 RB-Ms.
| July 2007
||Construction begins on first RB-M.
| March 31, 2008
||Coast Guard delivers first RB-M to Station Little Creek, Virginia.
| April 7, 2008
||The service begins operational testing and evaluation, an 18-month period to verify that the boats meet operational effectiveness and suitability requirements.
| March 17, 2015
||The Coast Guard accepted delivery of the 174th RB-M – the final RB-M produced – achieving full operational capability.
| June 2015
||The Acquisition Directorate RB-M program transferred full responsibility for supporting the boats to the Coast Guard sustainment community.