What is the maximum duration for a temporary track in Open Ocean navigation?

In Open Ocean navigation, a temporary track serves as a means to plot a vessel's course for a limited duration, allowing for flexibility in navigation practices. The correct answer reflects that the maximum duration for a temporary track is typically set at 3 hours. This time frame allows navigators enough opportunity to make timely observations and course adjustments without committing to a lengthy course plan that may require more complex updates and logs.

Using a temporary track for 3 hours helps ensure that navigational data remains relevant and that any changes in weather, sea conditions, or operational requirements are quickly evaluated and acted upon. It also aligns with best practices in maritime navigation, promoting safety and situational awareness in open waters.