WWJP81 RJTD 030000 VITAL WARNING FOR NAHA NAVTEX AREA 030000UTC ISSUED AT 030300UTC PRESSURE GRADIENT IS STEEP GALE WARNING SOUTHERN SEA OFF SHIKOKU, SEA SOUTH OF OKINAWA WITH MAX WINDS 35 KT WARNING(NEAR GALE) NORTHERN SEA OFF SHIKOKU NXT WARNING WILL BE ISSUED BEFORE 030900UTC =