The correct answer is D) until just before they make contact with the limit switch, and then hand cranked to their final position. When hoisting a boat on gravity type davits using an electric motor driven winch, the davit arms should be brought up until just before they make contact with the limit switch. This is to prevent damage to the limit switch and the davit system. After reaching this point, the davit arms should be hand cranked to their final position to ensure a controlled and safe completion of the hoisting process. The other options are incorrect because: A) Bringing the davit arms up to the embarkation deck and then hand cranking them to the final position may not provide sufficient control and could potentially lead to damage. B) Operating the winch at slow speed until the final position is reached may not be sufficient to prevent damage to the limit switch. C) Bringing the davit arms up to the bar stop and then hand cranking them to the final position does not address the need to avoid damaging the limit switch.