What is the purpose of a diamond (non-lateral marker) in navigation?

The purpose of a diamond (non-lateral marker) in navigation is to warn of hazards and obstructions in the waterway. This type of marker is crucial for ensuring the safety of boaters by alerting them to potential dangers that could pose threats, such as shallow waters, underwater obstacles, or other hazards that could lead to accidents or damage to vessels. Unlike markers indicating fishing zones or fuel stations, a diamond marker specifically signals to boaters that they need to exercise caution in the vicinity. The use of such markers plays an essential role in marine navigation safety, allowing travelers to make informed decisions and take necessary precautions while navigating waters.