Cleon built 03/1907 Cochranes of Selby for Orient Steam Fishing Co
05/1915 Requisitioned as a mine sweeper
10/08/1915 Dover Straits – Cleon and Equinox both Grimsby-reg Admiralty Hired Trawlers, at anchor close together in Dover Harbour a Zeppelin dropped bombs just after midnight Cleon damaged
One landed near Equinox exploded in water, Funnel and Sides riddled with shrapnel.
Three Equinox crew asleep in their bunks below were wounded, one rating died of wounds, four asleep, two ratings killed outright, one dangerously wounded but recovered.
01/02/1918 Dover Straits – Dover Patrol, Skipper Peter Sinclair RNR
On patrol between Folkestone Gate buoy and NE Varne buoy
Disappeared, Explosion heard at 2100 damaged boat found nearby believed mined and foundered off Folkestone Gate Buoy off Kent 51.02.09N 01.10.12E
1 officer, 11 ratings lost, no survivors
| Surname | Forenames | Age at Death | Date of Death | Rank | Boat |
| CAWLEY | ARCHIBALD | 20 | 01/02/1918 | Deck Hand | Cleon |
| WATSON | JAMES | 22 | 01/02/1918 | Trimmer | Cleon |
Her details are
- Official Number 125050
- Yard Number 391
- Admiralty Number 1514
- GT 270 NT 120
- Armament 1-3pdr or 1-6pdr
- Dimensions 128.6 x 22 x 11.6
- Quarter Deck 62′ Foc’sle 26′
Sunk by mine near Folkstone Gate Bouy 01/02/1918 whilst in Admiralty service