i did do the math on this specific subject here with the information you have posted and these were the results

i found out that with cruise, the ship sails at a measly 3.891 knots, which is slow as all hell in historical terms since during the age of sailing, ships usually reached around 5-8 knots in 15KM wind based on route, size of ship, and weight of ship (including displacement)

if you were to constantly use your method of the “he-man walker” you reach a speed of 24.324 knots, about twice the speed of a modern tanker, or in easier terms 24 blocks per 2 seconds, about 6 times faster then what we currently have