Oar in the context of "Rowing"

Longships (Old Norse: langskip) were long clinker-built warships (Old Norse: herskip, Old Swedish: hærskip) propelled by oars, and later also by sail, used by the Norse and surrounding Germanic tribes from at least the 4th century AD and throughout the Viking Age, being part of the Nordic ship building tradition. As the name suggests, they were long slender ships, intended for speed, with the ability to carry a large crew of warriors. They are sometimes called "dragonships" (Old Norse: drekaskip) due to a tradition of the fore and aft ends being decorated with a raised dragonhead (Old Norse: drekahofud) and tail respectively, with the sail making up the "wing" of the dragon. The largest types were thus called "dragons" (dreki), while smaller types had names such as karve (karfi), snekke (snekkja), and skeid (skeið).

Archaeological finds have been made of longships from the 9th, 10th and 11th centuries in Denmark, Norway and Germany, with motifs on Gotlandic picture stones dating to the 8th century or earlier. It is thought that the Norse specifically invented the design for Viking usage, which included raiding and warfare, exploration and commerce. The longship is a rather distinctly Norse (Scandinavian) construction, with bronze age petroglyphs in Sweden indicating a long tradition of building long animal-headed naval ships in Scandinavia. Equivalent clinker-built naval ships by the Wends (a South Baltic Slavic people) were much smaller and shorter in comparison.

Rowing is the act of propelling a human-powered watercraft using the sweeping motions of oars to displace water and generate reactional propulsion. Rowing is functionally similar to paddling, but rowing requires oars to be mechanically attached to the boat, and the rower drives the oar like a lever, exerting force in the same direction as the boat's travel; while paddles are completely hand-held and have no attachment to the boat, and are driven like a cantilever, exerting force opposite to the intended direction of the boat.

In some strict terminologies, using oars for propulsion may be termed either "pulling" or "rowing", with different definitions for each. Where these strict terminologies are used, the definitions are reversed depending on the context. On saltwater a "pulling boat" has each person working one oar on one side, alternating port and starboard along the length of the boat; whilst "rowing" means each person operates two oars, one on each side of the boat. On inland waterways, the opposite applies, with "rowing" being where each person in a crew works one oar and "sculling" (especially in sport rowing) involves each participant using a pair of oars. In a maritime setting "sculling" means propelling a boat with a single oar operated over the stern.

A galley is a type of ship optimised for propulsion by oars. Galleys were historically used for warfare, trade, and piracy mostly in the seas surrounding Europe. It developed in the Mediterranean world during antiquity and continued to exist in various forms until the early 19th century. It typically had a long, slender hull, shallow draft, and often a low freeboard. Most types of galleys also had sails that could be used in favourable winds, but they relied primarily on oars to move independently of winds and currents or in battle. The term "galley" originated from a Greek term for a small type of galley and came in use in English from about 1300. It has occasionally been used for unrelated vessels with similar military functions as galley but which were not Mediterranean in origin, such as medieval Scandinavian longships, 16th-century Acehnese ghalis and 18th-century North American gunboats.

Galleys were the primary warships used by the ancient Mediterranean naval powers, including the Phoenicians, Greeks and Romans. The galley remained the dominant type of vessel used for war and piracy in the Mediterranean Sea until the start of the early modern period. A final revival of galley warfare occurred during the 18th century in the Baltic Sea during the wars between Russia, Sweden, and Denmark. In the Mediterranean, they remained in use until the very end of the 18th century, and survived in part because of their prestige and association with chivalry and land warfare. In war, galleys were used in landing raids, as troop transports and were very effective in amphibious warfare. While they usually served in wars or for defense against piracy, galleys also served as trade vessels for high-priority or expensive goods up to the end of the Middle Ages. Its oars guaranteed that it could make progress where a sailing ship would have been becalmed, and its large crew could defend it against attacks from pirates and raiders. This also made it one of the safest and most reliable forms of passenger transport, especially for Christian pilgrims during the High and Late Middle Ages.

A trireme (/ˈtraɪriːm/ TRY-reem; from Latin trirēmis 'with three banks of oars'; cf. Ancient Greek: τριήρης, romanized: triḗrēs, lit. 'three-rower') was an ancient vessel and a type of galley that was used by the ancient maritime civilizations of the Mediterranean Sea, especially the Phoenicians, ancient Greeks and Romans.

The trireme derives its name from its three rows of oars, manned with one man per oar. The early trireme was a development of the penteconter, an ancient warship with a single row of 25 oars on each side (i.e., a single-banked boat), and of the bireme (Ancient Greek: διήρης, diērēs), a warship with two banks of oars, of Phoenician origin. The word dieres does not appear until the Roman period. According to Morrison and Williams, "It must be assumed the term pentekontor covered the two-level type". As a ship, it was fast and agile and was the dominant warship in the Mediterranean from the 7th to the 4th centuries BC, after which it was largely superseded by the larger quadriremes and quinqueremes. Triremes played a vital role in the Persian Wars, the creation of the Athenian maritime empire and its downfall during the Peloponnesian War.

A paddle is a handheld tool with an elongated handle and a flat, widened end (the blade) used as a lever to apply force onto the bladed end. It most commonly describes a completely handheld tool used to propel a human-powered watercraft by pushing water in a direction opposite to the direction of travel (i.e. paddling). A paddle is different from an oar (which can be similar in shape and perform the same function via rowing) – an oar is attached to the watercraft via a fulcrum.

The term "paddle" can also be used to describe objects of similar shapes or functions:

Paddling, in regard to waterborne transport, is the act of propelling a human-powered watercraft using at least one hand-held paddle, or paddling directly with the hands (without a paddle) as in traditional paddleboarding (also known as prone paddleboarding). The paddle, which consists of one or two blades joined to a shaft, is also used to steer the vessel via generating a difference in propulsion between the two sides of the watercraft. The paddle is not connected to the boat, unlike in rowing where the oar is attached to the boat.

In paddling sports such as canoeing and kayaking, the characteristics that are most important include "dynamic balance, core stability, pulling power, speed, endurance, stature, and rhythm".

The gondola (English: /ˈɡɒndələ/, Italian: [ˈɡondola]; Venetian: góndoła, Venetian: [ˈɡoŋdoɰa]) is a traditional, flat-bottomed Venetian rowing boat, well suited to the conditions of the Venetian lagoon. It is typically propelled by a gondolier, who uses a rowing oar, which is not fastened to the hull, in a sculling manner, and also acts as the rudder. The uniqueness of the gondola includes its being asymmetrical along the length, making the single-oar propulsion more efficient.

For centuries, the gondola was a major means of transportation and the most common watercraft within Venice. In modern times, the boats still do have a role in public transport in the city, serving as traghetti (small ferries) over the Grand Canal operated by two oarsmen.

Stern sculling is the use of a single oar over the stern of a boat to propel it with side-to-side motions that create forward lift in the water. The strict terminology of propulsion by oar is complex and contradictory, and varies by context. Stern sculling may also simply be referred to as "sculling", most commonly so in a maritime situation. In fresh water, and particularly in sport rowing, sculling is use of two oars on either side of the boat by each person, in contrast to sweep rowing, whereby each boat crew member employs a single oar, complemented by another crew member working on the opposite side with their oar.