Aids to Navigation
An element for improving maritime safety is the establishment and maintenance of a suitable number of navigational aids such as floating, fixed, and electronic (floating lights, lighthouses) and radio-navigational systems such as GPS, DGPS, beacons, etc. which is done by the channel management companies in NPA pilotage districts.
Buoys: A number of buoys have been deployed in designated areas and are in position to aid safe navigation in and around the pilotage districts. The buoys are all in functional order
- Light Houses
- The East & West Moles
- Control Towers
Bathymetric surveys have been carried out regularly in the last years and ranges from extensive team surveys to surveys of a small project areas carried out with open dinghy's and survey boats. Charts of all navigable channels within Port limits are available for a fee, on request from the Port Hydrographers at all Hydrographic Offices or Harbour Masters in each pilotage district of the Nigerian Ports Authority.
In the Lagos and Bonny pilotage areas, the channel management companies, under a Joint Venture arrangement with the Nigerian Port Authority ensure wrecks are removed to keep the channels wreck free as much as possible.
A Joint Venture arrangement has been put in place with technical partners to ensure continuous maintenance dredging to provide navigable channels all year round in the two pilotage districts.
Tide information can be got from the Tide Tables published by the Nigerian Navy and available for sale at NPA – Hydro & Dredging Department or The Nigerian Navy - Hydro office.
DATA THAT THE NPA HYDRO & DREDGING OFFICE NEEDS
Frequent new editions of charts are published where data are received on a regular basis, and if the nature and quantity of data justifies this. Harbour Masters should discuss with pilots and shipmasters using the port, the adequacy of the scale, coverage, content and regularity of update of the charts and publications.
In order to maintain charts and publication, the NPA Hydro office needs the following information:
- Hydrographic surveys: Hydrographic surveys undertaken or commissioned by a port in its area of responsibility are needed to update charts and publications. The format of digital hydrographic survey data supplied can be in any modern media suitable for transmission in floppy disk, CD ROM, ZIP, with the primary data and accompanying documentation. The digital data which should include horizontal and vertical datum, data, title and survey number must be as comprehensive as possible.
- Developments: Harbour developments affecting quays, dredged areas, new berths, new berths and onshore building outlines within the habour area are of particular interest. Information expected would include the nature of the work, its location (with preliminary drawings), key scheduled dates, and associated new or temporary navigational aids to be put in place, with the tie when they will be installed and in operation, and their precise positions. This will enable the Port Authority to consider putting in place notices to mariners and publication corrections. In addition, on completion of the job, the NPA Hydro & Dredging Department would like to receive copies of engineering drawings showing the development, together with details of navigational aids and their characteristics, and the limits of any newly dredged areas or depths in the area.
- Topographic Information: An inspection of the shoreline from a vessel is often useful, hence details of onshore buildings development in the port vicinity and adjoining coastal areas are needed for updating the chart of the areas.
- Other Hydrographic Information: Information on new or changed hydrographic features, either surface or subsurface should be passed to the NPA Hydro Office. This includes cables, pipelines, marines, rigs, FPSO terminals, etc for updating charts covering the specific areas.
- Pilotage Services, Port Operations and Vessel Traffic Services: it is crucial that details of all new services, procedures and amendment to existing ones be reported to the NPA Hydro & Dredging Department, if possible in advance of implementation.