All Hands on Deck Achievement in PowerWash Simulator

Right, this is actually really bloody confusing, because if you take what the Fishing Boat's details page says, it says there's three decks on the boat: the main deck, the bridge deck and the roof deck. Well, first things first, the bridge deck and the roof deck do not count. They are not classed as decks for this achievement.

Instead, the decks that do count for this achievement are the main deck and the bow - and of course the steps that connect them. Easy enough now you know this. Just be careful of the anchor chain when cleaning the bow, and the small holes around the outside of the wall of the deck itself and you'll be fine.