I too am building in 1:60 at the moment. In my case, Bounty. I am far from being an expert, though I was in the RN, I have served in ships with wooden decks (both warships and sailing vessels) and I have spent FAR too much time scrubbing them! My build is the first that I have undertaken, but I have received compliments on some of my work thus far.
I cannot remember whereabouts on the net I found the lengths to cut my deck planking but I do remember it scaled (give or take) at 8cm. I used a three butt shift pattern because it was a pattern that I had learned about during my time in the mob.
In my case, for symmetry, I drew a centre line on the supplied plywood deck base and worked either side of that. I've attached a couple of photos of my deck piece once I had cut around the edge of the deck and cut out the various hatches etc. in the ply template.
I hope this is of some use to you.
PS, I tried to simulate the caulking by running a 4B pencil along one edge/end of each plank, but it didn't really show as well as I would have preferred, so I stepped the lines in with a 4Hpencil after laying the planks. I used the same pencil to step in the treenails.
Edited by Phill Elston, 28 March 2016 - 06:46 PM.