RG has various meanings in the NOTAM Contractions category. Discover the full forms, definitions, and usage contexts of RG in NOTAM Contractions.
The opposite of a trough. Longitudinal area of high barometric pressure. Longitudinal extent of a raised part of sea bed. A line or wall of broken ice forced up by pressure. May be fresh or weathered.
NOTAM ContractionsTerm used by miners when they offer uncut opal for sale.
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