Sectored LED Port Entry Systems
Application: AIS enabled Port Entry Light System comprising SL-PEL-10, SL-AIS, and SL-155NPS sectored lantern
Owners: Eastland Ports
Site: Waikanae Beach Front Lead (3958 New Zealand Light List)
Location: Gisborne, New Zealand
Date: April 2016
Eastland Ports New Zealand upgrades Port Entry Lighting system.
Eastland Ports recently commissioned a Sealite Port Entry System for the Waikanae Beach approach. The Sealite Port Entry lighting system is now providing a safe approach in both day and night to the Gisborne loading facility.
The port entry lighting system includes a Sealite AIS transmitter providing mariners with real-time identification of the station, its availability, and position, ensuring confidence for approaching mariners and pilots.
The traditional leading lights at Waikanae beach had served their purpose well, however, a new port entry system mounted on a single column was identified as the most cost-effective way to upgrade the existing lead lights. The existing rear tower needed repair making the Sealite PEL-10 mounted on the front structure a natural choice.
The Sealite PEL-10 was chosen for its cost saving benefits and flexibility because its light beam is made up of individual one-degree sectors which can be user-adjusted to the desired ash patterns and intensities as required by Eastland Ports.The possibility to equal the existing station’s performance and gradually introduce the extra bene ts the light now offers via the easy to use programmer at no extra cost was an important consideration.Minimal maintenance other than simple cleaning for the life of the product was an additional benefit.
In 2015 the Port embarked on a 5-year plan of building a “Port for the future” and achieving “more value from its current assets” by a 1.3-hectare expansion to assist the port’s principle export commodity – logs. Combined with the purchase of a new tug to achieve a forecast export of 3.5 million tonnes of logs, it was important the port offered the latest aids to navigation to help handle vessels of up to 30,000 tonnes and lengths of 190 meters with a beam of 32.5metres.
The traditional leading lights at Waikanae beach had served the port well for countless years buffeted from severe weather conditions, however, due to the deterioration of the equipment and support structure, an increase of the port’s background lighting and the cost of replacing a twin tower leads, they were identified as bene ting from a revamp. By embracing new technology in keeping with the ports’ 5-year plan enabling larger vessels to safely enter the port with more confidence, the project became an important deliverable.
After much consideration and investigation, the Sealite LED Port Entry Lighting System was selected. Eastland Ports were able to eliminate the need for the rear structure, its light, and power supply by changing to a single station with advanced technology.The Sealite PEL-10 was selected for its cost saving bene ts, an ability to provide a high-intensity light for use in the daytime at a reduced power consumption, therefore improving its daytime recognition without the use of costly day marks.
In keeping with Eastland Ports desire to modernise Gisborne Port, they also provided AIS identification, providing their masters and pilots navigation information in “real time” with the knowledge that the navigational aid was available prior to starting their approach to Waikanae Beach. The Sealite Port Entry lighting system is now providing that safe approach during both night and daytime operations to the Gisborne loading facility.
How does the LED Port Entry Systems Work?
The LED port entry lighting system is an integrated solution utilising a directional precision SL-PEL-10 and an omni-directional SL-155-NPS marine lantern.The PEL projects a series of up to ten coloured LED sectors each with a very sharp colour boundary resolution between sectors. With a combination of any red, white and green LED’s these can be arranged to provide the mariner with an indication of where he is in the channel by a combination of colour and character changes since each LED can be controlled individually. Typically, a Sealite PEL sector light can achieve color change over 1 minute of ARC which represents 300mm at a distance of one mile. It is therefore important for masters and pilots to stand still on the bridge of their vessel to achieve the maximum bene t from the new light.
All navigational aids are used by the mariner in advance of when they are needed, creating a hand over to the next aid to be used especially on course changes or leading up to a course change. Providing AIS on the beacon enforces this confidence to the mariner that the aid is functional before it can be seen.
Extending the horizontal sector beyond the high intensity sectors is a visual method of achieving the same thing. When the PEL is combined with either another PEL its sectors can be extended at the same intensity or in the case of Waikanae Beach the PEL was combined with an SL-155-NPS lantern so that vessels could observe the light off bearing at a reduced intensity.The diagram included illustrates the principle of horizontal coverage and difference of intensity. By synchronising both lights at range they appear as one offering the same kind of “feel of approach” that the old leading system would have offered off bearing.