The D class has a single 50hp outboard engine and can be righted manually by the crew after a capsize. Equipment includes both fitted and hand-held VHF radio, night-vision equipment, and first aid kit including oxygen.
All RNLI inshore lifeboats are built and maintained at the Inshore Lifeboat Centre (ILC) in Cowes, Isle of Wight. A D class lifeboat is generally refitted every 2 years. This process sees the entire lifeboat stripped and rebuilt with any part found to be worn, torn or broken being repaired or replaced.