The timeline demostrates which lifeboats have been in service in Scilly during different periods of history, since they officially began service in the Islands in 1874.

|St Mary’s Lifeboat|Date|
|Henry Dundas|1874 to 1919|
|Elsie|1919 to 1930|
|Cunard|1930 to 1953|
|Guy and Claire Hunter|1955 to 1981|
|Robert Edgar|1981 to 1998|
|Whiteheads|1998 – |

|St Agnes Lifeboat| Date|
|James and Caroline|1890 to 1904|
|Charlie and Dure James|1904 to 1920|