At 09h35, Thursday, 29 April, NSRI Gqeberha duty crew were activated following a request for assistance from a RHIB (rigid hull inflatable boat), with 5 crew onboard, reporting to be adrift and taking on water approximately 1 nautical mile off-shore of Pollock beach.The sea rescue craft JLT Rescuer was launched and while responding to the scene red distress flares were sighted further out to sea and on investigation a Catamaran ski-boat, with 8 crew onboard, was found capsized.The 8 casualties were taken onboard our sea rescue craft and they were not injured.A report was then received from the service vessel Amadoda who had come across a capsized RHIB, in the same vicinity, with 8 crew onboard. The service vessel had taken the 8 crew, who were not injured, onto their vessel and the NSRI's JLT Rescuer met up with the Amadoda and transferred the 8 casualties from the NSRI craft onto Amadoda.That RHIB was righted and towed into Port with all 16 casualties by the service vessel Amadoda without incident.The sea rescue craft Spirit of Toft was launched and proceeded to the capsized Catamaran ski-boat which was righted and then towed into Port without incident.The sea rescue craft JLT Rescuer then located the RHIB, with motor mechanical failure that was taking on water, with her 5 crew onboard, and NSRI towed them to Port without incident.Once all casualties and all craft were safely in Port and all casualties were accounted for no further assistance was required.NSRI commend the skipper and crew of Amadoda for their assistance.