The Abandoned Ship? It's on Route 108 (to the right of Dewford) on the north side, pretty close to the beginning of Route 109.
Its near Dewford town,just keep surfing that way >>>>>
Mr briney can be found near petalburg woods he takes you dewford town.
its near dewford on route 106 right above dewford
Wrong. It is not near Dewford. Go to slateport city and go down. Go until you are sufing on route 109. Surf near the rocks at the top of the screen. You should see a ship. It won't look all broken down, but it's the ship. go inside.
Type your answer here... go to the ship near dewford and find a device then give it to a reasercher at the top of the ship and go to the guy at the ferry place in slateport and ask him to give you the seatooth
Between Dewford and Slateport cities.
Near dewford town
its in one of the houses in Dewford town get it from the fisherman in dewford town next to the gym.
There is no Abandoned Ship on Diamond. There is one, but only on Emerald in between Dewford and Slateport.
You go left from Dewford until you see a small ship, then go inside.
Near the petalburg woods is a house here lives Mr Briney he can take you on his ship to dewford city but only after you save his beloved pal Wingull in Rusturf Tunnel which is found east of Rustboro City.
East from dewford town you need Surf to reach there.