https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 24.2 2026-06-24T11:05:30.557Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/platforms/ef194fe1-50e0-4ba7-943a-c87c6f5e72c1 2021-05-18 NOAA Twin Otter Date=2021-05-18 User Id=sritz Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=NOAA Twin Otter [ef194fe1-50e0-4ba7-943a-c87c6f5e72c1,621142] - Aircraft [227d9c3d-f631-402d-84ed-b8c5a562fc27,611533] Date=2021-05-18 User Id=sritz Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: With an endurance of 4-6 hours at survey speeds, the Twin Otter is more than capable of covering over 600+ nautical miles of low altitude survey in a given flight at max fuel loads. These aircraft remain very busy year round supporting airborne marine mammal, hydrological, remote sensing, air chemistry and emergency response programs. Normal crew size is two pilots with a cabin capable of seating six people with smaller science equipment installed. Known for its stability at slower speeds, the Twin Otter is capable of surveying between 90-140 knots over the ground, making it ideal for missions that require a slower aircraft for data collection. language code: en Date=2021-11-17 User Id=tstevens Entity=BroaderRelation Operation=DELETE User Note=Move Concepts System Note=delete broader relation Old Value=NOAA Twin Otter [ef194fe1-50e0-4ba7-943a-c87c6f5e72c1,826885] - Aircraft [227d9c3d-f631-402d-84ed-b8c5a562fc27,826065] Date=2021-05-18 User Id=sritz Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: NOAA De Havilland DHC-6-300 Twin Otter language code: en Date=2021-11-17 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Move Concepts System Note=add broader relation New Value=NOAA Twin Otter [ef194fe1-50e0-4ba7-943a-c87c6f5e72c1,826885] - Propeller [6175c78e-432c-4254-b442-40d3cf0f6b34,835882] With an endurance of 4-6 hours at survey speeds, the Twin Otter is more than capable of covering over 600+ nautical miles of low altitude survey in a given flight at max fuel loads. These aircraft remain very busy year round supporting airborne marine mammal, hydrological, remote sensing, air chemistry and emergency response programs. Normal crew size is two pilots with a cabin capable of seating six people with smaller science equipment installed. Known for its stability at slower speeds, the Twin Otter is capable of surveying between 90-140 knots over the ground, making it ideal for missions that require a slower aircraft for data collection. 2021-05-18 15:41:15.0