Which line-pull sequence requests a slate?

• A. 2-1-2 line pulls.
• B. 5 line pulls.
• C. 3-2 line pulls.
• D. 1 line pull.

Answer: (A)

In underwater signaling, line-pull sequences are a set communication method between the diver and the surface team, where each specific pattern requests a different action or item. The pattern of two pulls, then one pull, then two pulls is the code that signals a request for a slate. A slate is used to write down information when talking isn’t practical, so this sequence directly tells the surface crew to provide a slate and writing instrument. Other pull sequences are reserved for different requests or statuses, so this exact two-two-one-two pattern uniquely identifies the slate request and prompts the tender to supply it.