1A Engines for vessels w/ unrestricted continuous operation
Average load:
70 - 80% of rated power
Rating definition:
ICFN, fuel stop
Typical annual usage:
unrestricted*
Overload capability
to 110% (ICXN) for factory acceptance test, but
limited to 100% for operation. 1DS ratings are not overload capable at all
(exception: 4000M93)
1B Engines for fast vessels with
high load factors
Average load:
60 - 80% of rated power
Rating definition:
ICFN, fuel stop
Typical annual usage:
5000 hours*
Overload capability
to 110% (ICXN) for factory acceptance test, but
limited to 100% for operation. 1DS ratings are not overload capable at all
(exception: 4000M93)
1D Engines for fast vessels w/
intermittent load factors
Average load:
≤ 60% of rated power
Rating definition:
ICFN, fuel stop
Typical annual usage:
3000 hours*
Overload capability
to 110% (ICXN) for factory acceptance test, but
limited to 100% for operation. 1DS ratings are not overload capable at all
(exception: 4000M93)
1DS Engines for fast vessels with
low load factors
Average load:
60 - 80% of rated power
Rating definition:
ICFN, fuel stop
Typical annual usage:
1500 hours*
Overload capability
to 110% (ICXN) for factory acceptance test, but
limited to 100% for operation. 1DS ratings are not overload capable at all
(exception: 4000M93)
Please note: 1A, 1B and 1D ratings are overload capable to 110% (ICXN) for factory acceptance test, but limited to 100% for operation. 1DS ratings are not overload capable at all (exception: 4000M93).
