New HF/MF Digital Maritime Mobile

Systems

Globe WirelessGlobe Wireless

Global provider of Maritime Communications Solutions

Managing customer email & data services for 15 years

Installed on more than 4000 ships Basis of meeting regulatory driven

applications– GlobeAlert ship security alert system

– GlobeLocator long range identification and tracking of ships

– GlobeWeather forecasts

– Other fleet management functions

Efficient large file transfer Marinet communications

protocols Sustained high speed transfer Full duplex communications Store and forward delivery

Least Cost Routing Email connectivity Data Connectivity GlobeCrewTM Kiosk

Satellite

CUSTOMER VESSEL

CUSTOMER OFFICE

HF Radio

Maritime DataNetwork

Cost Effective Messaging Near Real-Time Delivery Timely delivery

confirmation Notification of satellite

traffic waiting on shore

Network Operations Center

The Secure Message Handling System automatically routes all incoming and outgoing messages to destinations

INTERNET

INTERNET

Email Fax Telex Cable Telephone

Use existing office equipment and systems to exchange messages and data with

vessels at sea

Service Overview

GlobeSecureSM

Optional Virtual Private Network

with Globe Wireless

CrewEmail

ApplicationData

Satellite Delivery

Connected Worldwide

The Maritime Data Network

“Always on” connection 25 HF stations world wide Approximately 300 channel pairs Half receive and half transmit Delivers 50,000 messages per day Alternative to satellite systems Traffic doubles every 18 months

– Message growth and new applications– Flexible for efficiency improvement

Globe Wireless ReliabilityGlobe Wireless Reliability

Guaranteed message delivery Multiple frequencies and stations Network operating centers in California and England All stations have backup power 99.97% service availability over the last four years Ships use both HF and satellite communications Shipboard equipment is self diagnosing 24/7 customer support

Below Deck Equipment

Personal computer Marine HF radio Globe Wireless modem Power supply

Above Deck Equipment

Vertical antenna Antenna coupler GPS receiver

Globe Wireless Modem

Small form factor Uses digital signal processing technology Call set up protocol is a simple extension to

NBDP Bandwidth efficiency of about two BPS per

Hertz OFDM modulation rather than single carrier

– Resistant to multipath fading

NBDP Globe Wireless

500 Hz, 1 Tone

3000 Hz, 32 Tones

OFDM Spectrum

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

02.8 kHz Wideband Signal Spectrum

Frequency (Hz)

Magnitude(dB)

OFDM Parameters Carrier

– 300 HF frequency pairs in the marine bands– 32 tones– QPSK modulation– 62.5 Hz carrier spacing– 2 ms guard interval– 700-2700 Hz occupied bandwidth

Timing– 1.520 seconds per burst cycle– 1.095 second burst duration (tone + sync + data)– 0.425 second response (ACK/NACK + round trip delay +

processing time)

Data efficiency– 2 bits/second/Hz

Vessel Performance Example

Vessel: Island Time Total bytes-shore to ship 12986 Successful links OFDM 8PSK 4PSK 200FSK 100FSKDate: 02/21 Total bytes-ship to shore 5116 Link mode % time 8.7 0.0 86.7 4.6 0.0GCC: GCC 4.13 Total messages 44(4) Ave bytes/min 293 230 129 COD 0.90Modem: GL 5100 Average message size 445 Link mode % bytes 11.0 0.0 86.0 3.0 0.0

Ave data rate (bytes/min) 251(233:439) CC-sig lvl:tones 0.47 Tones 19Ave link start time (min) 1.4 CC-sig lvl:link time -0.16Average link time (min) 1.9(2:1.7) CC-sig lvl:bytes/min 0.23Link success rate(%) 89(88:100) CC-bytes/min:msg size 0.54

WCC(26:Louisiana) 12.6245(3) 13.0275(7) 17.3754(12)WNU(8:Louisiana) 8.4255(1) 12.6704W(4) 12.9665(6) 16.942(10)8PO(7:Barbados) 12.6804(5) 16.8415(9) 17.1554(11) 19.7414(14)VCT(2:Newfoundland) 8.6614(2) 13.1624(8)KPH(1:California) 19.7305W(13)

Frequency vs TOD

0

5

10

15

20

25

0 5 10 15 20

Hour of Day

MH

z

Successful Links Failed Links

Link Time Performance

0

5

10

15

20

25

2.5 5

7.5 10

12.5 15

17.5 20

22.5 25

27.5 30

Mor

e

Minutes

No

. o

f L

inks

0.00%20.00%40.00%60.00%80.00%100.00%120.00%

Successful Links Failed Links Cumulative %

Link Data Rate

0

5

10

15

20

25

100

200

300

400

500

600

700

800

90010

00M

ore

Bytes per Minute

Nu

mb

er

of

Lin

ks

020040060080010001200

Byt

es

Number of Links Message Size

Shore Station Performance

WCC

WNU

8PO

VCT

KPH

WCC WNU 8PO VCT KPH

WCCWNU 8PO

VCT

KPH

0

50

100

150

200

250

300

350

0 1 2 3 4 5 6

Link Time (secs) Signal Strength Data Rate

Frequency Use

0

5

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25

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Number of Frequencies

Frequencies (MHz) Number of Attempts

Link Performance

0

100

200

300

400

500

600

700

1 2 3 4 5 6 7 8 9 10 11 12 13 14

Number of Frequencies

Link Time (secs) Signal Strength Data Rate

Adaptive HF Features

Dynamic data rate adjustment Automatic link establishment Adaptive frame mapping Individual tone retransmission Least cost routing Frequency agility

Planned New Features

Next generation protocol– Capacity improvement– Adds broadcast/multicast capability– Message delivery in as little as 2 seconds

Similar to current protocol– Same OFDM modulation and spectral efficiency– Improved timing and protocols

Protocol Improvements

New protocol is twice as efficient as current protocol New protocol eliminates call set up time No hardware changes on ship Twice as many vessels plus broadcasts, paging, network

messages on the same number of channels

Current Protocol

Ack

Data

Ack

Data

Ack

Data

Ack

Data

Data Data Data Data

Data Data Data Data

New Protocol

Summary

The Globe Wireless Maritime Data Network is operational world wide

Being used by 4000+ vessels Offers greater flexibility than satellite only

systems Ongoing improvements for more capacity

and new services Increased spectral efficiency and more HF

channels are both needed for continued growth in maritime use