What does a signal starting with 'T' generally indicate in maritime communication?

In maritime communication, signals starting with the letter 'T' are recognized in the International Code of Signals, where they specifically denote "Temperature." This is essential for navigators and mariners to communicate vital information regarding weather conditions or operational parameters related to the temperature of the air or water, which can impact navigation and safety at sea.

While the other options relate to important aspects of maritime operation, they are not associated with the specific signal meaning tied to the letter 'T.' For instance, "Time," "Direction," and "Speed" are conveyed through different designators in maritime communication. Understanding the specific meanings of these signals helps ensure effective and precise communication in maritime activities, which is crucial for safety and operational efficiency.