Final answer:
Manoeuvring signals are used by vessels such as commercial ships and transport via trailered boats to convey intentions and prevent collisions, in accordance with maritime laws including the COLREGs. These are crucial for safety in navigable waters and are especially important for fisheries and individuals transporting their boats to the water.
Step-by-step explanation:
Vessels that must give manoeuvring signals are typically those operating in proximity to other vessels or in navigable waters where rules of the road apply, such as commercial ships, large boats, and sometimes recreational vessels when in congested areas. These signals are given under circumstances where risk of collision exists or to signal intentions regarding a vessel's direction or movement, as required by maritime law and regulations, such as the International Regulations for Preventing Collisions at Sea (COLREGs). Inland rules may vary but are generally similar in requiring signals under similar conditions.
Manoeuvring signals are particularly important for transport via trailered boats, which may include the movement of commercial or recreational craft, often by fisheries or individuals involved in aquatic activities. These boats are typically trailered to and from the water using vehicles, and proper signalling is necessary when manoeuvring to launch, retrieve, or when on the water to ensure the safety of all near the vicinity.
Fighting with a large army under your command is nowise different from fighting with a small one: it is merely a question of instituting signs and signals. This phrase underscores the universal importance of signals for coordinating movements and actions — in maritime contexts, clear and understood signals are similarly essential for ensuring safe and efficient manoeuvring among vessels.