Captain Errdo is the Gnome glider pilot stationed at the top of the Grand Tree (Ta Quir Priw). A player may ride on his glider to any of the other stations.
He also can be found at the glider crash east of Varrock (Lemanto Andra).
He is also an easy customer of the mini-game Gnome Restaurant but does not give any special reward such as Gnome Scarf or Gnome Goggles. In fact he gives no other tip than coins.