The shipyard bike, like many bikes, was a means of quick transportation, where automobiles and parking was not so convenient, such as dockside or pier side. It is a common misconception that the shipyard workers actually rode their bicycles "on" navy ships - (in like the Clint Easwood movie on decommissioned amphibious carriers with ramps). Just think how inconvenient it would be to lug a bicycle up flights of stairs, an then walk it across the gangway (brow) with all of the other shipyard workers and sailors onboarding and offboarding, just to get to the quarterdeck and have nowhere to ride. No, it would be more convenient for the shipyard supervisor or team-leader to leave his bike at the pier, securely locked in a bike rack. Also of great convenience, would be a front basket to carry tools, tool bags, and smaller parts, from the distant workshop (pipe shop, electrical shop, etc.) or the supply building, all the way to the ship at the opposite end of the shipyard. Why would a shipyard worker be joy riding a bike on a ship when he had work on the ship to do.