[1] After commissioning she spent her career in Home waters and North America on trade protection duties.

After her rebuild she served in Home Waters, North America, West Indies and the Mediterranean on trade protection.

She was completed on 4 May 1712 at an initial cost of £1,869.17.53/4[Note 1][4] She was commissioned in 1712 under the command of Captain James Dalzell, RN.

She returned to Home Waters in 1716 for a small repair at Deptford from September to December 1716 at a cost of £1,302.12.9d.

[Note 2] She was under the command of Captain Thomas Willyams, RN in 1717 for service in the North Sea and Baltic.

She returned to Home Waters and underwent a survey on 20 March 1727 and was ordered to be rebuilt as a 375-ton sixth rate.

Captain Thomas Limeburner, RN took command in July 1740 and sailed with Ogle's Squadron to the West Indies arriving in November 1740.

[12] HMS Seahorse was sold by Admiralty Order (AO) 1 December 1747 to Mr Milward for £5,033.18.3d[Note 6] on 28 July 1748.