Martrade Shipping and Transport GmbH caused the arrest of the MV 'Unity' in Durban in February 2014 under the Admiralty Jurisdiction Regulation Act 105 of 1983 to obtain security for claims pursued against United Enterprises Corporation in London arbitration proceedings. United Enterprises furnished a letter of undertaking to secure the vessel’s release, although the vessel was deemed under arrest in terms of the Act. United Enterprises later applied to set aside the arrest and, failing that, sought counter-security. The High Court dismissed the setting-aside application but ordered Martrade Shipping to furnish counter-security within specified time periods. A dispute arose as to whether Martrade Shipping had furnished security timeously under that order. After the registrar approved the form of security outside the initial 15-day period but within 30 days, United Enterprises contended that the arrest had lapsed. The High Court upheld that contention, leading to this appeal.