| Vessel Category |
<200GT
<1500kW
|
200-500GT
<3000kW
|
500-3000GT
<3000kW
|
500-3000GT
3000-
6000kW
|
500-3000GT
6000-
9000kW
|
Up to 60nm from a safe haven
|
AEC |
Y4 |
Y3 |
Y2 |
Y1 |
Up to 150nm from a safe haven
|
MEOL |
Y3 |
Y2 |
Y2 |
Y1 |
Over 150nm from a safe haven
|
Y4 |
Y3 |
Y2 |
Y1 |
Y1 |