Enterprise Passage

 water, strait / channel / passage / narrows, invisible

“Enterprise Passage” used by ships going southwards.
Vessels should enter and leave Enterprise Passage during daylight only, except when there is ample moonlight. Tidal currents in the S approach to the Gulf of Aqaba are uncertain and sometimes attain a considerable velocity. Caution is necessary when approaching at night. If navigating Enterprise Passage at night, it has been reported that visual bearings of the lights marking the passage are preferable to radar ranges of the nearby coast. The light structures in Enterprise Passage are difficult to distinguish during the day and the night as well.
The wind in Enterprise Passage and Grafton Passage is very strong and the swell heavy at times, causing considerable tide rips. Gales, which spring up suddenly, are reported to occur frequently at night.
A local magnetic anomaly lies along the E shore of the gulf.