My father turns 83 this year, his hips/knees are getting the better of him, and a bout of shingles left him with nerve damage in one leg.  I'm looking for a safer way to get him in/out of his boat (18' Lund Tyee).

Was wondering if anybody has been down this road before, and what they've used.

Currently, we try to have 2 people along with him, one stands on the dock, one in the boat, helping his feet over the gunwale.  It gets trickier when it's just me with him.

I'm considering a pool ladder, one side shorter than the other to rest on the dock.  They have the handrails at the top but I'd cut one off so he can pivot and wouldn't have to try and lift his feet up so high as he turns to go down the other side.

Thoughts?