When using GPS, is it necessary to have a nautical chart?

Having a nautical chart while using GPS is essential because it provides critical visual information about the surrounding waters, such as depth, navigational hazards, and points of interest that GPS alone cannot fully convey. While GPS provides precise location data, it does not give context about the environment, which is vital for safe navigation. Nautical charts depict features like buoys, shipping lanes, and underwater obstacles, allowing the navigator to make informed decisions based on the vessel's position in relation to these features.

Additionally, relying solely on GPS can lead to risks, especially in areas where signal interference may occur, or if the equipment fails. Having a nautical chart serves as a backup navigation method and enhances situational awareness, ensuring that the navigator can adapt to unforeseen circumstances.

While some vessels may rely more heavily on GPS technology or feel confident navigating without traditional nautical charts, it is a best practice to utilize both for safe vessel operation at all times, especially considering the complexities of marine navigation.