MARPOL Annex 4

Question 1

Which vessels does Annex 4 apply to?

Answer 1

All vessels over 400GT or 15 or more passangers

Question 2

Which is the Special Area?

Answer 2

Baltic Sea

Question 3

When can sewage be discharged?

Answer 3

Sewage treatment plant- Must be class approved. Anywhere, anytime. Check with local regulations
Comminuted and disinfected- Approved by flag. +3nm from nearest land, en route, not taking shortest route, +4kts. No visible effluent. CAN BE IN S.A
Raw- Not in SA. Otherwise must have holding tank +12nm from nearest land, en route, not visible, discharged at acceptable

Question 4

When can RAW sewage be discharged?

Answer 4

Not in a special area
+12nm from nearest land, proceeding en route, no visible surface waste, discharged at ISPPC required rate, holding tank on board

Question 5

At what rate can RAW sewage be discharged?

Answer 5

As stated in the ISPP Cert per IMO regulations

Question 6

Which certification is required under Annex 4?

Answer 6

International Sewage Pollution Prevention Cert.

Only has initial and renewal every 5 years

Question 7

when else might vessels need to be surveyed?

Answer 7

If major work has been taken out on the sewage equipment or work that could effect the system

Question 8

Who issues the ISPP Cert?

Answer 8

Usually class under the authority of flag