NAVIGATIONAL INSTRUMENTnavigational instrument · English · Reference checkedReferenceOpen English WordNet 2024oewn2024:lemma:NAVIGATIONAL INSTRUMENTTier 1Ordinal278Pythagorean98Classical263Reverse316Reverse Reduction136Standard1781Final Large1781Ordinal233Reduced71Atbash640Isopsephy1983Ordinal264Abjad1859