Mach trim, that's JAR OPS requirement.
JAR-OPS 1.450 Low visibility operations –
Training and Qualifications
(See Appendix 1 to JAR-OPS
1.450)
(a) An operator shall ensure that, prior to
conducting Low Visibility Take-Off, Category II and
III operations:
(1) Each flight crew member:
(i) Completes the training and
checking requirements prescribed in
Appendix 1 including Flight Simulator
training in operating to the limiting values
of RVR and Decision Height appropriate to
the operator’s Category II/III approval; and
(ii) Is qualified in accordance with
Appendix 1;
(2) The training and checking is
conducted in accordance with a detailed syllabus
approved by the Authority and included in the
Operations Manual. This training is in addition to
that prescribed in Subpart N; and
(3) The flight crew qualification is
specific to the operation and the aeroplane type.
THe reference for the detailed training you will find in Appendix 1 to JAR-OPS 1.450 Low Visibility Operations – Training &
Qualifications. Its basically ground, Sim and flight training with all the possible failure considerations. It just would be too long to copy it all in here.
Cheers.
