The 2007 World Swimming Championships were held in Melbourne in March of that year. While most of the competition took place at the Rod Laver Arena in a temporary pool christened the Susie O'Neill Pool (synchro and swimming) and the Melbourne Sports and Aquatic Centre (diving and water polo), the open water events were conducted at St Kilda Beach.
For the open water events Korevaar was a key provider of barges to house officials and support crews at the St Kilda site. To satisfy the requirements of precise course lengths barges were positioned using GPS and once located had to remain in position for the duration of the eight days of open water competition.
Vessels provided by Korevaar included:
The barges were positioned in relatively shallow water with anchors and chains which had to be kept clear of the course proper to ensure that competitors did not come into contact with the moorings.
The night after the barges were finally in position bad weather struck Port Phillip Bay and Korevaar's crews expected the worst. A site visit the following morning revealed that while the heavy weather had washed stones from the sea floor onto the deck of the barges, they had all remained on station and no adjustment of locations was required.
The six races, 5km, 10km and 25km for both men and women took place from 18 to 25 March. On the last day of competition the weather had again turned foul and a number of competitors and officials suffered from sea-sickness in the choppy conditions.