nma_reference_scheme.pdf
Weather Ships (OWS) MET/2/4/1/2/d Harbours and Piers MET/2/4/1/2/e Light Vessels MET/2/4/1/3 Upper Air MET/2/4/1/3/a Tephigrams MET/2/4/1/3/b Upper Air Tables MET/2/4/1/3/c Upper Air Data MET/2/4/1/3/d Met Reconnaissance Flights MET/2/4/2 Data Display MET/2/4/2/1 DWR / DWS MET/2/4/2/2 DWR Supplements MET