Exam Question
Q7
Explain the following with reference to MARPOL Annex-VI
(a) Ozone depleting substances and its emissions control.
(7)
(b) Volatile Organic and its emissions control.
(6)
(c) NOx emissions and its control from ships.
(7)
Class 2 (2nd Engineer)
SSEP
📅 Jan 2026
Reference Answer
### (a) Ozone Depleting Substances (ODS) and its Emissions Control (MARPOL Annex VI, Regulation 12)
**1. Definition and Context:**
Ozone Depleting Substances (ODS) are chemicals that, when released into the atmosphere, contribute to the depletion of the stratospheric ozone layer. This layer protects the Earth from harmful ultraviolet (UV-B) radiation. Under MARPOL Annex VI, ODS includes:
* **Halons:** Halon 1211, Halon 1301, Halon 2402.
**1. Definition and Context:**
Ozone Depleting Substances (ODS) are chemicals that, when released into the atmosphere, contribute to the depletion of the stratospheric ozone layer. This layer protects the Earth from harmful ultraviolet (UV-B) radiation. Under MARPOL Annex VI, ODS includes:
* **Halons:** Halon 1211, Halon 1301, Halon 2402.
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