MARPOL Annex II - NLS Discharge Compliance

Noxious Liquid Substance discharge compliance check per MARPOL Annex II - distance from land, depth, en-route speed, and residue concentration.

MARPOL IINLSChemical

NLS categoryDistance from landnmWater depthmVessel speedkn

Compliance: Allowed (prewash for Y required before)

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{Cat X prohibited; Cat Y/Z} \Rightarrow d \geq 12\,nm,\ h \geq 25\,m,\ v \geq 7\,kn

Symbol	Meaning	Unit
$Category$	NLS X/Y/Z/OS
$d$	Distance from land	nm

Source: MARPOL Annex II + IBC Code

In short

Noxious Liquid Substance discharge compliance check per MARPOL Annex II - distance from land, depth, en-route speed, and residue concentration.

Learn the theory MARPOL Convention: Pollution Prevention