The Ann and James Ritchie II arrived on Saturday morning.
The £2.2 million Shannon lifeboat is the most advanced in the RNLI fleet.
A spokesman said it's safer and faster and designed to keep crew safer on shouts.
A formal naming ceremony and service of dedication will take place in early summer.
Power station chimney flue arrives this week
Peel sewage works hits milestone
MHK to query gas buying for power generation
Yoga studio applies for sign permission
Yacht club worries over lifeboat retirement
One nuisance cyclist ticketed in more than three years
Huge floating book fair to arrive in Douglas next month