Navigator Holdings is gearing up for ammonia fuelling and to carry CO2.

On the gas carrier company's third-quarter earnings call on Tuesday, chief commercial officer Oeyvind Lindeman said the New York-listed company was working with classification society DNV GL on ammonia as fuel.

And it is working with American Bureau of Shipping (ABS) on systems for CO2 transportation.

"Both projects fit with our own strategic objective for industrial shipping, being the logistics partner directly with producers and end-users," Lindeman said.