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Trial of Conspicuity Model

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Also available from iManage, document no: 32417

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Visual Perception of Non-rectangular Flashes at Threshold

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The Research and Radionavigation Directorate (R&RNAV), is carrying out a series of visual experiments on flashing lights as part of its investigation into the conspicuity of marine aid to navigation signals. This latest experiment involved the observation of various flash shapes at the threshold of perception. The aim of the experiment was to try and find a link between the shape, and duration, of a flash and its apparent brightness.

Tutt, I

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Visual Perception of Non-rectangular Flashes at Supra-threshold

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This latest visual experiment, in a series of experiments carried out by the General Lighthouse Authorities’ Research and Radionavigation Directorate (R&RNAV), studied the conspicuity of non-rectangular flashes of light at observer illuminance levels above the threshold of perception (supra-threshold).

Tutt, I

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ENC 2015 – ACCSEAS – The Innovative North Sea e-Navigation Demonstration

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The ACCessibility for Shipping, Efficiency Advantages and Sustainability (ACCSEAS) project aims to identify issues which obstruct maritime access to the North Sea Region (NSR), identify potential solutions, prototype and demonstrate these successful solutions using the International Maritime Organisations (IMO) e-Navigation concept in a test-bed in the NSR.

Shaw, G

Ward, N

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IALA Conference 2014 – e-Navigation and the ACCSEAS Project

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Accessibility for Shipping, Efficiency Advantages and Sustainability. Improving maritime accessibility to the North Sea Region. Develop an innovative test-bed of e-Navigation solutions.

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Can eLoran Deliver Resilient PNT?

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Can eLoran Deliver Resilient PNT paper presented at the ION Pacific PNT Conference – 2015

Hargreaves, C

Williams, P

Bransby, M

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Seamless Navigation with Resilient-PNT

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Seamless Navigation with Resilient-PNT paper presented at the ENC Conference – 2015

Williams, P

Ward, N

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500kHz Frequency Band Investigation

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Also available from iManage, document no: 29316

A Method of Providing Integrity for eLoran

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A method of providing integrity for eLoran paper presented at the ION ITM Conference – 2014

Williams, P

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VDES Channel Sounding Campaign

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This report presents the results of a VHF Data Exchange System (VDES) channel sounding campaign conducted by the General Lighthouse Authorities of the United Kingdom and Ireland (GLA) and the Institute for Telecommunications Research (ITR) at the University of South Australia. The channel sounding campaign examined radio propagation conditions for all channels intended for use in ship-to-shore and shore-to-ship VDES and Application Specific Message (ASM) communications. A comprehensive series of sea trials were conducted over five days during February/March of 2014, near Harwich, UK. Five operational scenarios were examined, spanning four of the six IMO Maritime Service Portfolio area categories. System components and deployment were consistent with real world maritime use.

Haley, D

Luppino, R

Grant, A

Ward, N

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