In response to a rpwillia query, the following/attached is my setup:
To start – fall overboard, then
Step 1 – grab line 1 (as per pic att.) and hang on to it. This lies loosely on top of transom, is a silver floating line attached to the ladder, long enough to fall into the water, but not long enough to foul the rudder or prop.
Step 2 – holding onto line 1 grab line 2 and pull to open the latch attached. You will probably find, that one of the ladder latches is more difficult to open than the other. Mine is the port latch. Therefore, I open the starboard one first as this needs no extra leverage and has the pulling line directly attached to it.
Step 3 – letting line 2 go , but still hanging on to line 1, I now pull line 3 . This is tied to a lever which is attached to the port latch and assists to open this.
(Both line 2 and 3 ends also lie loosely on the transom platform. They are both lead around rear stanchions to provide extra leverage.)
Step 4 – once both latches are open, I pull strongly on line 1 to lower the ladder, making sure that I am safely out of the way.
Step 5 – climb back aboard .
This appears a lengthy procedure, but only takes a few seconds in real life – I tried it successfully, after missing a dinghy I tried to jump into.