3.1.1 LR has a variety
of different machinery notations available to Owners. The various
options are outlined in Pt 1, Ch 2 Classification Regulations of
the Rules for Special Service Craft.
3.1.2 For the assignment
of an MCH notation, a manufacturer’s certificate
will be accepted for items of machinery and equipment for propelling
and auxiliary machinery for essential services. The propelling and
essential auxiliary machinery is to be installed and tested under
LR’s survey requirements and found to be acceptable to LR.
3.1.3 Acceptance
of a manufacturer’s certificate for a craft requiring the MCH notation is subject to the following:
- Vessel is to be less than 500 gt, or if greater than 500 gt is
not required to comply with international conventions applicable to
a craft with unrestricted service.
- Propulsive power is provided by oil engines that have been type
approved to LR requirements for marine application. LR will consider
other IACS members Type Approval certificates where equivalence can
be demonstrated.
- Electrical power is provided by generators driven by oil engines
that have been type approved to LR requirements for marine application.
LR will consider other IACS members Type Approval certificates where
equivalence can be demonstrated.
- The power of any engine is less than 2250 kW and the cylinder
bore is not greater than 300 mm.
- The design and manufacturing standards for machinery and associated
systems are the applicable LR Rules or other marine standards acceptable
to LR.
- Machinery and equipment is to be manufactured under a recognised
quality control system, e.g. ISO 9001.
- Propellers, propulsion shafting and multiple input/output gearboxes
are not included within the scope of propulsion arrangements for acceptance
of a manufacturer’s certificate.
3.1.6 The 
LMC machinery notation will be assigned when
the propelling arrangements, steering systems, pressure vessels and
the electrical equipment for essential systems have been constructed,
installed and tested under LR’s Special Survey and are in accordance
with LR’s Rules and Regulations. Other items of machinery for
propulsion and electrical power generation including propulsion gearing
arrangements and other auxiliary machinery for essential services
that are in compliance with LR Rules and supplied with the manufacturers
certificate will be acceptable under this notation. Acceptance of
a manufacturer’s certificate for a craft requiring the 
LMC notation is subject to the requirements
of Pt 1, Ch 2, 3.10 Application notes 3.10.2 of the
Rules for Special Service Craft.
3.1.7 The LMC notation
(without 
) will be assigned when the propelling and essential auxiliary
machinery have neither been constructed nor installed under LR’s
Special Survey but the existing machinery, its installation and arrangement,
has been tested and found to be acceptable to LR. This notation is
assigned to existing ships in service accepted or transferring into
LR class.
3.1.8 The following,
(non-exhaustive) list outlines key Chapters of the Rules for Special
Service Craft relating to machinery requirements: