这一区域的独特之处在于它的海域受到保护，且其潮汐运动不规律。为了使比赛不受风向和潮汐的影响，比赛的航程通常在比赛当天才能决定。
The area is characterised by its sheltered waters and unusual tidal conditions , so course layouts often have to be decided on the day of the race to suit the prevailing wind and tide conditions .
比赛航程