WWJP81 RJTD 210600 VITAL WARNING FOR NAHA NAVTEX AREA 210600UTC ISSUED AT 210900UTC PRESSURE GRADIENT IS STEEP GALE WARNING SEA SOUTH OF OKINAWA WITH MAX WINDS 35 KT WARNING(NEAR GALE) NORTHERN SEA OFF SHIKOKU, SOUTHERN SEA OFF SHIKOKU, SEA WEST OF NAGASAKI, HYUGA NADA, SEA OFF KAGOSHIMA, SOUTHERN PART OF EAST CHINA SEA, SEA EAST OF OKINAWA NXT WARNING WILL BE ISSUED BEFORE 211500UTC =