Lakatoi (also Lagatoi) are multiple-hulled^[1] sailing watercraft of Papua New Guinea.^[2] They are named in the Motu language and traditionally used in the Hiri trade cycle.^[3]

Lakatoi (whose literal meaning is three dugouts) are fashioned from two or more dugout logs fastened together to give stability and cargo-carrying capacity.^[1] The two or more dugouts are joined by booms, with a platform built on top.^[4] The sail is a crab-claw sail.^[5] Horridge (2008)^[6] discusses the rig and how the craft is manouvred.

• 
  Loading a lakatoi at Port Moresby, prior to 1885.
• 
  Lakatoi near Elevala Island, prior to 1885.
• 
  Papuan lake dwellings with a lakatoi under sail, 1898 or before.
• 
  1901 stamp by the British Government depicting a lakatoi.

• Crab claw sail

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See also: Lapita culture Domesticated plants and animals of Austronesia