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навигационная опасность stresses
busin.	navigational hazard
nautic.	danger of navigation; danger to navigation; nautical danger; off-lying danger; off-shore danger; reported danger; obstruction of navigation
navig.	hazard to navigation
навигационные опасности
fish.farm.	navigation hazards; navigational hazards
nat.res.	shipping dangers

навигационная опасность: 25 phrases in 3 subjects

Makarov	2
Nautical	22
Navigation	1