Final answer:
The term for laying down a line in long flat bights is 'faking.' This nautical term describes laying out rope in loose loops for easy use without tangling, different from coiling or belaying.
Step-by-step explanation:
Laying down a line in long flat bights is referred to by the term faking. This term is common in nautical parlance and refers to the process of laying out rope in long, loose loops that can be easily run out without tangling. This contrasts with coiling, which involves creating a series of overlapping coils that are stored in a more compact manner, and belaying, which refers to securing a rope to a fixed object to provide tension or control. Flemishing, or creating a Flemish flake, is a similar concept to faking but typically refers to arranging the rope in a neat, spiral pattern on deck.