| Ambrose, built in 1952-53, is the only lightship equipped with a modern catoptric type lens. |
| Like the lightship, the wreck rests in around 34m of water so it's another deep, dark dive. |
| The first lightship, established in 1732 at Nore Sand in the Thames estuary, was rapidly followed by others. |
| Britain's last lightship was towed from its position north-west of Guernsey to Harwich, ending an era of 157 years for the vessels. |
| It has the world's best-preserved wooden lightship with an exhibition showing how the crew lived and worked in those early days. |
| The last lightship in Scotland has been given a substantial lottery grant to prevent it from falling into dereliction. |
