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SL-PEL Series
Sectored Port Entry Light
3. Obstructions in front of any position selected.
4. Height of that point naturally above Chart Datum.
5. Light pollution around this spot.
6. Any shadows which will affect solar applications.
Through a combination of suitability and cost implications a theoretical position can be determined and
proposed to define safe passage through the channel and any obstacles. This latitude and longitude
point should be recorded and filled into the Sealite PEL Information Checklist and sent to Sealite to aid
discussions.
SUPPORTING AIDS:
Previously, Aids to Navigation (AtoNs) were considered stand-alone devices due to restrictions on
technology. With the improvements of radio and satellite communications however, it is now possible to
link these previous stand-alone aids. This is true for buoy synchronised channels and pairs of leading
lights, as well as channels and isolated buoys on leading line approaches.
It is now possible to select leads to be synchronised with specific beacons and buoys to increase the
mariner’s total field of vision in one time during approach. By revisiting the flash characters of previously
isolated aids it is now possible to create better approaches and combine these isolated beacons and
buoys to the approach character of the leading or sectored light.
Here again Sealite can assist in offering recommendations to enhance the approach to the leading
bearing. There are distinct advantages in reviewing supporting aids to enhance the overall marking of the
port and to save on power consumption. This can help increase the range of these aids to offset the ever
increasing background lighting in a port.
COMMISSIONING THE PEL SECTOR LIGHT:
Prior to installation it is recommended that the relative position of the site be checked against both the
charts and other prominent navigation marks used around the port. These can be breakwater or quay
edges, and church spires or lighthouses which have specific points of sight (i.e.: wind vanes and masts).
These can be used to check the relative bearing angle to each other and ensure the proposed leading
line is correct.
It is not unusual to discover small inaccuracies of charted rocks or quay extensions from those currently
on the chart due to the date and accuracy of the most recent surveys.