CAUTION - MARO REEF
Much of Maro Reef is covered at all stages of tide. There are no highly visible objects by which a navigator can determine his position. Recent hydrographic surveys do not exist in this area. The hydrographic surveys used for this chart did not achieve full bottom coverage, thus uncharted coral heads may exist. Uncharted areas of submerged reef of unknown depth may exist. Extreme caution should be exercised when navigating in this area.