English to Russian Tech/Engineering Aerospace / Aviation / Space SAR and MER personnel (Down-the-Line and Hoist Operator)

Речь идет о вертолетах. Вот контекст:

SEARCH AND RESCUE/MEDICAL EMERGENCY INCLUDING TEST AND TRAINING FLIGHTS
SAR and MER Flight (including flight crew, winchman and winch operator) (Call-out)
SAR and MER Flying hour charge (Hour)
SAR and MER personnel (Down-the-Line and Hoist Operator) (if applicable) (Hour)

Выдрано из бланка коммерческой оценки предоставления вертолетных поисково-спасательных работ.