Direct Internet 3 Iridium Proprietary and Confidential 9/18/2018

Direct Internet 3 Overview Direct Internet 3 Allows users with a data capable Iridium phone (or LBT) and computer to access the Internet through the Iridium Gateway Direct Internet 3 software is required to connect to Iridium’s Direct Internet server. Once connected, users can check email, browse the Internet and transfer data (FTP) at accelerated speeds with compression Internet Direct Internet 3 Software Iridium Gateway Direct Internet Server Switch Iridium Proprietary and Confidential 9/18/2018

How does Direct Internet 3 acceleration work? Direct Internet 3 uses Slipstream technology SlipStream uses patented acceleration, compression and network optimization to enhance the online experience for dial-up while significantly reducing bandwidth requirements. SlipStream uses adaptive data compression, combined with caching and network optimization, to streamline text, graphics, Flash and Web-based emails, including attachments. SlipStream technology features industry-leading loss and lossless compression algorithms, achieving compression of HTML and XML of up to 50 times. Iridium Proprietary and Confidential 9/18/2018

Direct Internet 3 speed vs. standard dial-up AppLabs Technologies, an independant lab, compared the Web browsing acceleration performance of SlipStream over dial up Internet access to that of standard Web browsing over non-accelerated dial up Internet access. The results indicate that for dial up Internet access significantly improved the time to deliver Web pages over the Internet when compared to non- accelerated browsing: Average acceleration gain of 5.45x (faster) On Iridium, this increases the effective data speeds from 2.4kbps to 13kbps Iridium Proprietary and Confidential 9/18/2018

Key Advantages over Direct Internet 2 Operating Systems Support Windows XP® Windows Vista® Windows 7® Mac OS® Easier Installation Process Slipstream SP6.0 Software Iridium Proprietary and Confidential 9/18/2018

What Can Direct Internet 3 Accelerate? ACCELERATES Web Pages Text, HTML, XML, JavaScripts, Style Sheets and Flash Content Graphics JPEG, GIF and PNG Email POP3, IMAP and SMTP FTP DOES NOT ACCELERATE Secure Web Sites HTTPS sites (e.g., Online banking) Streaming Media Audio or Video Streams Non-FTP File Downloads Music, Digital Photos or File Attachments Iridium Proprietary and Confidential 9/18/2018

Compatible Iridium Satellite Devices Data Capable Handsets Satellite Transceivers 9505A 9522B 9555 Iridium Proprietary and Confidential 9/18/2018

Supported Web Browsers Internet Explorer Mozilla Firefox Versions 5.0 or later Versions 1.5 or later Iridium Proprietary and Confidential 9/18/2018

Web Page Image Loading Differences Direct Internet 2 Direct Internet 3 Images load in their final resolution quality before usable web page becomes available Images load in low resolution first then progressively reach final resolution quality as you continue viewing the usable web page Final Resolution Low Resolution Final Resolution Iridium Proprietary and Confidential 9/18/2018

Direct Internet 2 – HTTP Requests Sent Sequentially Direct Internet 2 Server HTTP Request #1 HTTP Request #2 HTTP Request #3 HTTP Request #4 Direct Internet 2 Client Web Page Starts Loading Fully Usable Web Page Loaded Time Iridium Proprietary and Confidential 9/18/2018

Direct Internet 3 –HTTP Requests Sent Concurrently Direct Internet 3 Server HTTP Request #2 HTTP Request #3 HTTP Request #4 HTTP Request #1 Direct Internet 3 Client Web Page Starts Loading Fully Usable Web Page Loaded Time Iridium Proprietary and Confidential 9/18/2018

Accessing Email Use a client-based email software instead of web-based email software. For example: USE AVOID Mozilla Thunderbird® Windows Live™ Hotmail Eudora® Gmail™ Windows Live™ Mail AOL Mail. Outlook Express® Yahoo! ® Mail Outlook® Other Internet Service Provider Webmail Service Entourage® Any other client-based software Iridium Proprietary and Confidential 9/18/2018

Availability Included on CD-ROM with 9555 shipments as of December Available online for download from Iridium for Partners in support section under Firmware/Software Updates Information on Iridium.com in 9555 product section for end users (information only) Iridium Proprietary and Confidential 9/18/2018

Direct Internet 3 Summary Supports the latest Windows® operating systems and the Mac OS® operating system Faster Internet connection experience over previous versions of Direct Internet Easier Installation Process than previous versions of Direct Internet Available on Iridium for Partners, on CD-ROM in 9555 packaging, and information page on Iridium.com Iridium Proprietary and Confidential 9/18/2018