Which of the following is NOT included in the characteristics allowed to be shared during communication?

The sharing of information during communication, especially in the context of maritime operations, is crucial for the safety of vessels and navigation. Certain types of information are considered public and are essential for situational awareness, whereas other types, especially those pertaining to contracts or proprietary information, are confidential.

Charted buoy positions, lat/long of charted objects, and charted depths of water are all critical data points that promote safe navigation and operational efficiency at sea. These pieces of information assist mariners in avoiding hazards and understanding their environment, making them vital for real-time decision-making. They are publicly available and can be shared without compromising security or privacy.

In contrast, confidential vessel contracts contain proprietary business information that should not be disclosed to others outside of the involved parties. This type of information is protected by law and its sharing could lead to competitive disadvantages or breaches of confidentiality agreements. Thus, it is not appropriate to share such information in communication regarding maritime operations.