Neptune, 1848
Type: Revenue Vessel ;
Notes:

20 Dec 1848 Revenue Vessel.

Neptune, 1861
Type: Coast Guard Cruiser ;
Laid down : at M. Wigram and Sons, Blackwall, 16 Feb 1861 ;
Launched : 8 Aug 1861 ;
BM: 60 tons ;
Notes:

Subsequently returned to the contractors not being fit for the service, the cost having been repaid into the Exchequer.