For the record, BMI limit is 30.........
LW20
To answer your question, 'augment' crew are used on flights in which a FDP can not be conducted using normal FDP rules. Perth, for example, which has a flight time of around 10 hours will have 3 crew, normally 1 Captain and 2 F/O's. Orlando, with a flight time of around 15 hours will have 4 crew, 2 Captains and 2 F/O's. A pairing of one Captain and one First Officer will be the 'operating' crew, doing the landing and take off, with rest periods split equally for the flight. The other pairing will be known as the augment crew and are provided for the in flight relief. On the return sector, the roles are reversed and the 'augment' crew now become the operating crew. A rest guide is provided but not always followed. Operating Captains are supposed to contact the crew if they intend changing the pattern of rest, some don't! The very longest of flights can have 2 separate breaks recommended for each crew whilst the majority will have one single rest period. The Company can in exceptional circumstances change the rank combination in the above examples.
We don't have 'Second Officers', only First Officers (2 stripes) or Senior First Officers (3 stripes). EK does not,
at present, operate a 'cruise' pilot policy. Given the current and developing shortage, that policy may well change!
Hope this helps.
Harry