Jimbei's speech in the VIZ version was worded very well, props again to Stephen. Afterward in this version Jimbei says "I'll help you identify sea currents!!" and while that isn't much different from the other fan version, the way its presented here just cements Jimbei as the future helmsman for the crew.
When I think of Jimbei, the Fishman Karate master, steering a boat super efficiently I'm reminded of southern Chinese martial artists from back in the day. The southerners were/are a little shorter, stockier and they were fisherman and farmers. They developed their styles with their fishing and farming professions in mind with a lot of low squatting and powerful stances. Even today you can see folks going up and down rivers on little rafts or boats practicing their arts while being perfectly in tune with the motion of the boat being rocked by water. Those southern styles are what were combined with traditional martial arts of Okinawa to birth Karate in our worlds Ryukyu Kingdom.
The similar names, the birth place of Karate/Fishman Karate and Ryukyu Kingdoms heavy involvement with maritime trade just fit too perfectly for Jimbei being the helmsman. I initially didn't like the thought that if Jimbei was good at manipulating water just make him the helmsman because it seemed way to shallow. Now though when I consider some real world history and Fishman Karate being the mastery of water, why not have the best water master steering a sheep helping the navigator identity sea currents? I used to look at steering the Sunny and Fishman Karate as completely separate skills but no so much any more.
Plus there is a lot going on between Nami and Jimbei. Their past, their present, their future are pretty intermingled and could make for some great development as the years go on. Them working together to lead the Sunny in a way that only they can could give us some great moments in the future.
I hope my thoughts are cohesive.