Large crowds are expected to welcome the Queen and the Duke of Edinburgh when they visit Dorset.
The Royal couple will take part in a walkabout in King's Park and Pier Approach in Bournemouth on Wednesday.
Later they will be joined by the Duke of Kent for the official opening of RNLI's new lifeboat college training
facility in Poole.
The college allows crews to practice life-saving techniques in a wave tank which replicates real conditions.
RNLI chief executive Andrew Freemantle said the new purpose-built residential Lifeboat College and Survival Centre would "enable the charity to save more lives at sea and make the job safer for lifeboat crews".
During the visit, the Queen and Duke will also meet about 60 World War II veterans when they arrive at Bournemouth Pier Approach.