you got the falcon and not the DR?
not sure about your safety case here, but this is how I’d probably do it, if it was a 1man job. 50kgs is definately a bit much for a one man lift, especailly as the umbilical may get slimy and difficult to hold!
Can’t you just secure a sheave wheel to the front of the prongs of the fork lift – drill through the blade and secure with a bolt? Alternatively, can you clamp on an extension to the fork prongs? How secure is your system if you just use the handbrake?
Probably need an 0.6m to 0.8m diameter sheave and use it to reduce the destructive forces on deployment/recovery. If you were fancy you could mount a small kellums grip about 15 -20 m up the umbilcal from the vehicle kellums and then use a vehicle towbar winch to lower the vehicle by hooking onto that second kellums? Be sure and check the forklift can take a 50kg force without moving.
By the time the vehicle is in the water, the tether should slacken and you should still have enough umbilical on the jetty to detach the vehicle winch from the kellums, wrap some electrical tape around the kellums so it doesn’t get caught in the thrusters.
On recovery, fly to underneath the fork, pull on the tether till it goes tight, find the kellums, reattach to the winch line.
Pull !
With a second person, you could use the fork lift in combination with the vehicle winch to lower onto the jetty without anyone ever having to step close to the edge.
best of…
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