Maritime Limits Irish Baseline

In 1703 territorial waters were defined as extending out to three nautical miles of the coast – the distance that could be covered by a cannon shot. In 1958 the Geneva Convention introduced the concept of Baselines from which all other measurements would begin.
Baselines were to be smooth and parallel too, rather than following the Detailed indentations of the coast. Baselines join headlands and may run to the low-water mark of islands. All waters – marine and Transitional (estuarine) on the landward side of Baselines – are part of the internal (inland) waters of the State. The territorial sea extends out to 12 nautical miles from the Baselines.
The Irish Republic territorial sea Covers an area of 27.487 km squared. The area covered by internal waters is 13.650 km squared.

1703年，领海（territorial waters）被定义为向外延伸至海岸外3海里——即一枚加农炮弹所能覆盖的射程范围。1958年，《日内瓦公约》（Geneva Convention）引入了领海基线（Baselines）的概念，所有海域测量均以其为起始基准。领海基线需平滑且相互平行，而非顺应海岸的细致凹凸轮廓。领海基线连接各岬角（headlands），可延伸至岛屿的低潮线（low-water mark）。领海基线向陆一侧的所有海域，包括海洋水域与过渡性（estuarine）河口水域，均属于一国的内水（internal waters）范畴。领海从领海基线向外延伸12海里。爱尔兰共和国领海面积为27.487平方千米，其内水面积为13.650平方千米。