
Navy strength gin is a juniper-forward gin bottled well above standard strength, by tradition at about 57% ABV.
Higher-proof gin (about 47%)
The closest match, like US-market Tanqueray. It sits between standard gin and navy strength and gives a slightly softer drink at the same measure.
Standard dry gin
At the same measure you get about 30% less alcohol from the gin, and it tastes thinner once diluted. To match the strength, pour nearly one and a half times as much. Expect a bigger, more gin-forward drink.
By tradition, 57% is the strength at which gunpowder wetted with the spirit would still light. Many brands use the botanicals of their standard gin; the extra strength concentrates the juniper and the rest.