I-4 satellite repositioning

The first two I-4 satellites were launched in 2005 and the third I-4 satellite was recently launched on 18 August 2008. This will bring global coverage for FleetBroadband services. Now the I-4 launch program is complete, Inmarsat will be repositioning its I-4 satellites in order to optimize its network. This repositioning process is expected to be complete by late February 2009.

FleetBroadband service outages

During the satellite repositioning process, there will be two short service outages. This will affect a small number of FleetBroadband users in specific locations for a short period. Other Inmarsat maritime services will continue to operate and there will be no impact on GMDSS.

First service outage

Once the I-4 F3 satellite is operational, FleetBroadband traffic from I-4 F2 will transferred to the new I-4 F3 satellite, which will then assume the name of I-4 Americas, covering the Pacific and Atlantic Oceans.

Once the I4-F2 satellite has been vacated, it will then move from 53W to 25E, to assume its new position over EMEA. FleetBroadband service will not be available on this satellite during the repositioning process, which is expected to take 25 days, from 7 January to 2 February 2009.

The map below shows the area where FleetBroadband service will not be available on the I-4 F2 satellite, affecting users transiting through a vertical strip of the Atlantic Ocean.

This map depicts Inmarsat’s expectations of coverage during the first phase of repositioning of its I-4 satellites. The red area indicates where FleetBroadband service will be temporarily unavailable. The repositioning process does not affect services on the I-3 satellites. This map does not represent a guarantee of service. The availability of service at the edge of coverage fluctuates depending on various conditions.






Second service outage

Once the I-4 F2 satellite is in its new position, FleetBroadband traffic from I-4 F1 will be transferred on to the I-4 F2 satellite, which will then assume the name of I-4 EMEA, covering the Atlantic and Indian Oceans.

Once the I4-F1 satellite has been vacated, it will then move from 64E to 143.5E, to assume its new position over Asia-Pacific. FleetBroadband service will not be available on this satellite during the repositioning process, which is expected to take 19 days from 6 – 24 February 2009.

The map below shows the area where FleetBroadband service will not be available on the I-4 F1 satellite, affecting users in parts of Asia-Pacific.

This map depicts Inmarsat’s expectations of coverage during the second phase of repositioning of its I-4 satellites. The red area indicates where FleetBroadband service will be temporarily unavailable. The repositioning process does not affect services on the I-3 satellites. This map does not represent a guarantee of service. The availability of service at the edge of coverage fluctuates depending on various conditions.