Which method is suitable for determining whether a space is flooded without opening a watertight closure?

• A. Soundings
• B. Check for condensation
• C. Tapping diagonally
• D. Observe circuit breakers

Answer: (A)

Determining whether a space is flooded without opening a watertight closure relies on getting a direct reading of water depth inside the space. Soundings accomplish this by lowering a sounding line or using a gauge to contact the water in the space beyond the closure. If the line or gauge detects water, the space is flooded; if it remains dry, the space is not flooded. This method gives a real, objective indication without breaking the seal, helping you decide whether it’s safe to proceed with opening the closure or if you need to take other actions first.

Condensation isn’t a reliable indicator of actual flooding, as moisture can appear without actual water in the space. Tapping diagonally doesn’t provide a dependable measure of water presence inside a closed space. Checking circuit breakers won’t reveal whether floodwater is present. Soundings, by providing a direct measurement of liquid in the space, are the appropriate approach.