WWJP73 RJTD 150600 IMPORTANT WARNING FOR YOKOHAMA NAVTEX AREA 150600UTC ISSUED AT 150900UTC STNR FRONT FM 42N 158E TO 41N 152E 40N 147E 36N 142E 35N 137E 33N 133E WARNING(DENSE FOG) EASTERN SEA OFF SANRIKU, WESTERN SEA OFF SANRIKU, NORTHERN SEA OFF KANTO POOR VIS 0.3 MILES OR LESS IN PLACES NXT WARNING WILL BE ISSUED BEFORE 151500UTC =