If you asked a cross-section of surfers where in the world they would most like to go surfing, the answer would invariably be the Mentawai Islands. This remote, equatorial chain is strung out on the front line of the Indian Ocean swell barrage and possesses an embarrassment of riches when it comes to perfect reef bathymetry and flaccid, wavering winds. And that’s not all that Sumatran waters have to offer with a hamper full of tasty waves on Nias, the Hinakos, the Banyaks and the mainland province of Lampung, home of the Sumatran Pipeline.