The new Burnham-on-Sea inshore lifeboat has been delivered, which is faster and carries seats for a crew of four.
Crews are now being given training on the Atlantic 85.
It's expected to be ready to be used in an emergency in the coming days.
Lifeboat Operations Manager Matt Davies said: "Now that the boat and all her equipment has arrived a week of familiarisation starts for the crew, both afloat and ashore.
"The team have all made a great start on this and training continues throughout this week.
"The RNLI staff will constantly be assessing the team so the boat can be used to it's full potential once on service at the end of the week.
"All week, every station volunteer has been taking part in familiarization training, as the Atlantic 85 is a step up from their old boat Staines Whitfield - which is presently being repaired for operation in the RNLI relief fleet.
"Staines Whitfield has given dependable service since it's delivery in December 2003, but lifeboats are hard-working and replacement this year was inevitable.
"The new lifeboat is one metre longer with more powerful engines and features refinements such as Radio Direction Finding and radar.
"Also being longer, the boat is faster, and now carries seats for a crew of four."