On 14 June 2017, the Bulk Carrier "RAINBOW HARMONY"  (GT 22,456 – DWT 35,106) immobilised about 300 miles west of Luanda, Angola following generator failure.  During the incident the vessel was on a passage from Panjang, Indonesia to Brake, Germany, laden with 32,000 tonnes of Indonesian palm kernel expeller.

On 18 June, Tsavliris Salvage were contracted to provide assistance and on 19 June the AHTS "UOS EXPLORER" was dispatched from Limbe, Cameroon, arriving at the casualty's position on 22 June. The vessel was supplied with 50 tonnes of fresh water and 30 cases of bottled water. Tow line was established and towage to Walvis Bay, Namibia commenced on the same day. The convoy arrived safely at destination on 2 July. The salvage tug provided standby services at Walvis Bay anchorage according to the Master's instructions until 26 July when the operation was completed and the salvage tug was released.