SeaNet "Dial-Up" Fleet Traffic 2000
Total Time
6654 minutes
Total Data Flow
687 MBytes
Average Data Rate
1.72 Kbytes/sec
Total Cost
$66,540
$Equivalent IntelSat Bandwidth
666kHz

TABLE 1
Table 1 above summarizes the actual traffic and cost of the SeaNet operations on the UNOLS fleet during 2000 utilizing the InmarSat system. This system operates as a "dial-up" Internet connection with a per-minute tariff.

 

ROADNet
Model High-Seas Network
Link
Data Rate (kbps)
Required Bandwidth (kHz)
Ship 1 Inbound
64
97.2
Ship 2 Inbound
64
97.2
Ship 3 Inbound
64
97.2
Ship Outbound
64
163.4
Fixed Site Outbound
19.2
29.2
Fixed Site 1 Inbound
19.2
38.2
Fixed Site 2 Inbound
19.2
46.4
Fixed Site 3 Inbound
64
97.2
Total
 
666kHz
TABLE 2
For comparison, table 2 shows how the same $ could be used for the high-seas extension of ROADNet. The 666 kHz satellite bandwidth could accommodate 3 ships each with dedicated 64 kbps inbound channels and 3 fixed stations each with 19.2 kbps dedicated inbound channels with two shared 64 kbps outbound channels.

 

 

 

 

Abstract >

 


Return to the ROADNet Homepage>