Boating Coach US
Pollution and the environmentQuestion 337 of 352

In a zone where untreated sewage is banned, how do you secure a Type III device?

  1. Open every valve a little
  2. Lock the toilet seat down
  3. Mark the valve with tape
  4. Close each overboard valve and remove the handle
Show answer

Correct answer: Close each overboard valve and remove the handle

Closing the valves and taking off the handle, or locking them, stops discharge.

Source: US Code of Federal Regulations (eCFR), 33 CFR Part 159: Marine Sanitation Devices, § 159.7 Requirements for vessel operators

All questionsPractice the topic "Pollution and the environment"

Questions last reviewed: 18 October 2026