WTPH20 RPMM 020000 TTT TYPHOON WARNING 5 AT 0000 02 OCTOBER TYPHOON {CHABA} (1618) WAS LOCATED BASED ON ALL AVAILABLE DATA AT ONE NINE POINT SEVEN NORTH ONE THREE ONE POINT SIX EAST FORECAST TO MOVE NORTHWEST AT ZERO SIX METERS PER SECOND ROUGH TO PHENOMENAL SEAS WITHIN THREE FIVE ZERO KILOMETER RADIUS ESTIMATED CENTRAL PRESSURE NINE SIX THREE HECTOPASCALS MAXIMUM WINDS FOUR ONE METERS PER SECOND NEAR THE CENTER THREE THREE METERS PER SECOND WITHIN ONE FIVE ZERO KILOMETER RADIUS ONE THREE METERS PER SECOND WITHIN THREE FIVE ZERO KILOMETER RADIUS FORECAST POSITIONS AT 030000 TWO FOUR POINT ONE NORTH ONE TWO EIGHT POINT FIVE EAST AT 040000 TWO EIGHT POINT THREE NORTH ONE TWO EIGHT POINT TWO EAST AND AT 050000 THREE THREE POINT ONE NORTH ONE THREE ZERO POINT FOUR EAST ALL SHIPS WITHIN TYPHOON AREA ARE REQUESTED TO SEND THREE HOURLY WEATHER REPORT TO PHILIPPINE ATMOSPHERIC GEOPHYSICAL AND ASTRONOMICAL SERVICES ADMINISTRATION PD PAGASA=