An ODP will typically list a specific ceiling and specific visibility( Example :" 400-2 or std. with min. climb gradient 300 ft./nm".) if standard vis. conditions have a higher than standard climb gradient (greater than 200 ft. nm) and a aircraft that cannot meet the higher than standard climb gradient should use the higher mins. (400-2).
Reference KMRN ODP for runway 21. Runway 21 only lists takeoff mins. for standard conditions. It does not give a "or" option as in the example above. Does this imply that even if the vis. is greater than standard that you must always climb at the published 225. ft. nm?
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