A lancaran or lanchara is a type of sailing ship used in Maritime Southeast Asia. Although similar in shape to Mediterranean galleys, the lancaran was the backbone of the regional fleet of the western half of Nusantara before Mediterranean influence came.: 151 For their war fleet, the Malays prefer to use shallow draught, oared longships similar to the galley, such as lancaran, ghurab, and ghali. This is very different from the Javanese who prefer long-range, deep draught round ships such as jong and malangbang. The reason for this difference is because the Malays operated their ships in riverine water, sheltered straits zone, and archipelagic environment, while the Javanese are often active in the open and high sea.: 270–277, 290–291, 296–301 : 148, 155
The term lancaran is derived from Malay word lancar, which means "swift", "fast", "not hindered", and "velocity without effort". Thus the word lancaran may be interpreted as "swift vessel".
Lancaran is swift, local ship propelled by oars and sails with two quarter rudders, one on either side of the stern. In Aceh, lancarans were taller than galley but equalled them in length. They had one, two, or three masts, with junk sails or tanja sails (canted rectangular sail). Lancarans had a crew of between 150 and 200 crew. Lancaran can be equipped with several lela (medium cannon equivalent to falconet) and swivel guns of cetbang and rentaka variety. One distinguishing feature from the galley is the presence of an elevated fighting platform (called a balai), in which warriors usually stood and perform boarding actions.: 165 Cargo lancaran could carry 150 tons of cargo. The lancaran of Sunda had unique masts shaped like a crane, with steps between each so that they are easy to navigate.
Lancaran were used both as warships and for commerce. In the 14th–15th century A.D., Kingdom of Singapura and Sungai Raya each has 100 three-masted lancaran. During the Demak Sultanate attack on Portuguese Malacca of 1512–1513, lancaran were used as armed troop transports for landing alongside penjajap and kelulus, as the Javanese junks were too large to approach the shore.: 74 Lancaran was the other type of vessel counted by Tome Pires after junks and penjajap upon arriving at a port.: 185, 195
Royal lancaran of Lingga is said to carry 200 fighting men and is about the size of a large galleass (larger than ordinary galleys). The regular lancaran of Pasai is said to carry 150 men and is under the command of a Javanese captain. Large ones with 300 crew are said to have been Javanese vessels. In the 1520s, smaller lancarans of Bintan and Pahang were armed with only 1 berço (breech-loading swivel gun, likely refers to cetbang), but also had arrows, spears, and fire-hardened wooden spars. Nicolau Pereira's account of the 1568 Acehnese siege of Malacca said that Aceh's boats are usually lancaran. It has two rows of oars and was as long as galleys. An anonymous work depicting the 1568 siege showed a ship with a double quarter rudder and 3 masts, which corresponds with "lancaran bertiang tiga" (three-masted lancaran) mentioned in Malay texts.: 150–151