Type: Straits Surveying brig ; Armament ?
Displacement : 180 tons ; Notes:
Whilst not RN vessels the Tonze and Mohr &c. are invariably referred to as HM Steam gun-boats or similar, but really belonged to the Singapore Government.
6 Aug 1861 in Singapore harbour for repairs.
19 August 1862 in Singapore harbour the Straits Government survey brig, Commander Jackson, and up for sale.