Final answer:
A tender receiving 2-Line pulls from a diver indicates a non-verbal communication signal where, commonly, 2-Line pulls mean 'Give me slack.' It is essential for the tender to respond accurately for the safety of the diving operation.
Step-by-step explanation:
When a tender receives 2-Line pulls from a diver, it indicates a set of pre-arranged communication signals used in underwater diving. These line-pull signals are a vital part of diver communication, especially when visibility is poor, or verbal communication is impossible. Understanding the specific meaning of line pulls is crucial for the safety and coordination between the diver and the tender on the surface.
In many standard sets of diving signals, 2-Line pulls often mean 'Give me slack,' but the exact meanings of these signals can vary depending on the agreed-upon protocols between the dive team. It is imperative that the tender responds correctly to the line signals to ensure the safety and effectiveness of the diving operation.