| 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. |