Dry Operating Mass (DOM): It is the total mass of the aeroplane ready for a specific type of operation excluding usable fuel and traffic load.
Beside the BEM, DOM includes items such as:
1- Crew and crew baggage.
2- Catering and removable passenger service equipment.
3- Potable water and lavatory chemicals.
4- Food and beverages.
BEM is determined by the manufacturer, DOM is determined by the operator.
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