Which of the following terms refers to the method of moving a fitting from one side to another using a pipe or hose?

The term that refers to the method of moving a fitting from one side to another using a pipe or hose is "athwart ships." This term describes a direction that runs parallel to the width of the ship, or side to side, as opposed to lengthwise, which is referred to as fore and aft.

When moving fluids or other materials across the vessel, the term "athwart ships" captures the action of maneuvering items or fittings across the ship's horizontal plane. This is particularly relevant in nautical operations where efficient movement across the vessel's width is often necessary for loading, unloading, or operational adjustments.

In contrast, overboard typically refers to something being thrown or falling off the side of a vessel, rigging pertains to the ropes and equipment used to support and control the sails and masts, and siphoning is a specific technique for transferring liquids using atmospheric pressure and gravity, not specifically related to moving a fitting from side to side.