2.10 Members were Invited to provide their comments and proposals thereon for NAV45.
World-wide Radionavigation System
2.11 The group recounted the actions given in Resolution A 860(20)- Maritime Policy for a Future Global Navigation Satellite System (GNSS). The first action, to be completed by autumn 1999 for input to the 21 st Assembly, involved a reassessment of the Resolution, if necessary as a result of unforeseen developments on specific proposed future GNSSs.
2.12 The group was of the opinion that there had been no unforeseen developments and that there was nothing to add at this stage.
2.l3 The next action, to be completed by autumn 2001 for input to the 22nd Assembly, involved the consideration of the proposed future GNSS, including the related agreements between Interested Governments, other international organizations and/or system providers.
2.14 Members were invited to provide their comments and proposals thereon for NAV45.
2.l5 The group was informed that there are practical difficulties with Differential Correction Systems in achieving the performance required of Resolufion A.815(19) - World-Wide Radionavigation System, paricularly the update rate of 2s. the signal availability requirement of 99.8% and the service reliabillty of 99.97%. The group noted that IALA intends to hold a workshop on GNSS later in the year where these difficulties may be distussed.
2.14 Members were invited to provide their comments and proposals thereon for NAV45.
3 ACTION REQUESTED 0F THE SUB-COMDIITTEE
The Sub-Committee is invited to consider this report and decide as apprtpriate.
