Austronesian vessels in the context of "Crab claw sail"

The Austronesian people, sometimes referred to as Austronesian-speaking peoples, are a large group of peoples who have settled in Taiwan, maritime Southeast Asia, parts of mainland Southeast Asia, Micronesia, coastal New Guinea, Island Melanesia, Polynesia, and Madagascar that speak Austronesian languages. They also include indigenous ethnic minorities in Vietnam, Cambodia, Myanmar, Thailand, Hainan, the Comoros, and the Torres Strait Islands. The nations and territories predominantly populated by Austronesian-speaking peoples are sometimes known collectively as Austronesia.

The group originated from a prehistoric seaborne migration, known as the Austronesian expansion, from Taiwan, circa 3000 to 1500 BCE. Austronesians reached the Batanes Islands in the northernmost Philippines by around 2200 BCE. They used sails some time before 2000 BCE. In conjunction with their use of other maritime technologies (notably catamarans, outrigger boats, lashed-lug boats, and the crab claw sail), this enabled phases of rapid dispersal into the islands of the Indo-Pacific, culminating in the settlement of New Zealand c. 1250 CE. During the initial part of the migrations, they encountered and assimilated (or were assimilated by) the Paleolithic populations that had migrated earlier into Maritime Southeast Asia and New Guinea. They reached as far as Easter Island to the east, Madagascar to the west, and New Zealand to the south. At the furthest extent, they might have also reached the Americas.

Indian Ocean trade has been a key factor in East–West exchanges throughout history. Long-distance maritime trade by Austronesian trade ships and South Asian and Middle Eastern dhows, made it a dynamic zone of interaction between peoples, cultures, and civilizations stretching from Southeast Asia to East and Southeast Africa, and the East Mediterranean in the West, in prehistoric and early historic periods. Cities and states on the Indian Ocean rim focused on both the sea and the land.

A balangay, or barangay, is a type of lashed-lug boat built by joining planks edge-to-edge using pins, dowels, and fiber lashings. They are found throughout the Philippines and were used largely as trading ships up until the colonial era. The oldest known balangay are the eleven Butuan boats, which have been carbon-dated individually from 689 to 988 CE and were recovered from several sites in Butuan, Agusan del Norte. The Butuan boats are the single largest concentration of lashed-lug boat remains of the Austronesian boatbuilding traditions. They are found in association with large amounts of trade goods from East Asia, Southeast Asia, and as far as Persia, indicating they traded as far as the Middle East.

Balangay were the first wooden watercraft excavated in Southeast Asia. Balangay are celebrated annually in the Balanghai Festival of Butuan.

The Maritime Silk Road or Maritime Silk Route is the maritime section of the historic Silk Road that connected Southeast Asia, East Asia, the Indian subcontinent, the Arabian Peninsula, eastern Africa, and Europe. It began by the 2nd century BCE and flourished until the 15th century CE. The Maritime Silk Road was primarily established and operated by Austronesian sailors in Southeast Asia who sailed large long-distance ocean-going sewn-plank and lashed-lug trade ships. The route was also utilized by the dhows of the Persian and Arab traders in the Arabian Sea and beyond, and the Tamil merchants in South Asia. China also started building their own trade ships (chuán) and followed the routes in the later period, from the 10th to the 15th centuries CE.

The network followed the footsteps of older Austronesian jade maritime networks in Southeast Asia, as well as the maritime spice networks between Southeast Asia and South Asia, and the West Asian maritime networks in the Arabian Sea and beyond, coinciding with these ancient maritime trade roads by the current era.