WWJP71 RJTD 170000 IMPORTANT WARNING FOR NAHA NAVTEX AREA 170000UTC ISSUED AT 170300UTC PRESSURE GRADIENT IS STEEP WARNING(NEAR GALE) NORTHERN SEA OFF SHIKOKU, SOUTHERN PART OF EAST CHINA SEA, SEA SOUTH OF OKINAWA NXT WARNING WILL BE ISSUED BEFORE 170900UTC =