All photographs courtesy of Margaret Flo McEwan, founder of The Maunsell Seaforts Appreciation Group on Facebook, unless individually credited

The Wreck of the SS Richard Montgomery

The Knock John Fort

In amongst the Guy Maunsell designed towers

Kentish Flats Wind Farm by Asha Priya

Grain Tower Battery by Asha Priya

Redsand Towers Buoy by Asha Priya

Knock John Fort

Shivering Sands Towers

The wreck of the SS Richard Montgomery

Redsands Fort by Ian Miles

Redsands Fort by Flo Dohmer

Knock John Fort by Amanda Marie Gray

How close does X-Pilot get?

"This close!" says Flo at Knock John

Flo at a set of Maunsell Towers

Captain Alan at Redsand Towers