the longer ladder PROBABLY won't fit in the spot they created, and an extra rope rung isn't going to stay flat.

https://www.amazon.com/Garelick-19617-61-Over-Platform-Telescoping-Ladder/dp/B00JDAVENU

I had this type of setup and added 9' of 2" double braid line and tied it to the end for a nice 5th step. you also need a grab handle and I'd add another (maybe) on the boat.

maybe under platform

https://www.amazon.com/dp/B08DHX97WW/ref=sspa_dk_detail_5?psc=1&pd_rd_i=B08DHX97WW&pd_rd_w=iqQ9m&content-id=amzn1.sym.08ba9b95-1385-44b0-b652-c46acdff309c&pf_rd_p=08ba9b95-1385-44b0-b652-c46acdff309c&pf_rd_r=ETJEF5RWBVGGEVFZK81F&pd_rd_wg=lZuGN&pd_rd_r=0f599d90-ad97-43d5-b97e-a20aaebab000&s=sporting-goods&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWxfdGhlbWF0aWM&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzRFU3NVNYVzZJSVZYJmVuY3J5cHRlZElkPUEwMTYyNjU3Mk5aVkxCTzNENVpTTSZlbmNyeXB0ZWRBZElkPUEwMzU4NDE3MllRUjZXR1dXS0E3WCZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

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-you have to see where your hand wants to reach.

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https://cdn.dealerspike.com/imglib/v1/800x600/imglib/Assets/Inventory/CE/A3/CEA30049-99EA-44FE-B631-492FD73BB1CB.jpg