At which point is a red rag located on the lead line?

The red rag on the lead line is positioned at the 7-mark, which serves a specific purpose in maritime navigation. This marking indicates a specific depth of water, allowing personnel to gauge how much water is beneath the vessel. The lead line is used primarily to find the depth of the water in which a ship is operating, and the red rag marks a critical point that often denotes caution.

Having the red rag at the 7-mark alerts the crew to a designated depth that may require attention, such as possible shallow areas that could pose a risk to navigation. Each marking on the lead line helps sailors understand the underwater topography and navigate safely. Therefore, knowing that the red rag is located at the 7-mark is essential for any Boatswain's Mate who needs to make informed decisions while maneuvering a vessel in various water depths.