SYDNEY — Boats carrying shark-repelling devices will accompany swimmers during the opening leg of the World Championship Series triathlon event on Sunday.

Organizers said Saturday the devices have been fitted to ease any fears of competitors before they dive into Sydney Harbour for the 0.93-mile swim. That segment will be followed by a 24.86-mile cycle and 6.21-mile run.

Sharks often are seen in the harbor, persuading organizers to utilize technology which emits an electronic signal to repel them.

Engine noise from boats following the swimmers also is expected to keep sharks away, while a helicopter crew filming the event also will monitor the situation.