Defense Products List
Application Group Types
The followings are an explanation of the various application group types.
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).
* Application groups (page 6-9) only indicate which mtu engine suits your demands best. For your type of vessel, you can also choose engines from other application groups than stated in the selection. guideline
RATING PHILOSOPHY
We are working hard to meet and even exceed the increasing
demands of ship owners and operators for cost-effective and
eco-friendly solutions. One example is the engine TBO (Time
Between Overhauls) which we optimize on the basis of field
data analysis and close inspection of engines and components
that have already proven their reliability in field operation.
Depending on the analysis results, we extend maintenance and
TBO intervals keeping safe operation assured.