| Linux-powered GPS may help divers explore shipwrecks |
Jan. 04, 2007
 A U.K.-based location-aware computing specialist is rumored to be developing a Linux-powered GPS handheld for snorkelers and deep underwater divers. An underwater-ready version of Node's Linux-based NodeExplorer handheld was reportedly featured in a local BBC channel report, according to a LinuxDevices reader.
LinuxDevices reader Jonathan Fogg writes, "The product seems to be targeted at scuba divers and the many people who enjoy snorkling etc., with a view to guiding them to, and around, the many amazing underwater sites in the world. Their technical researchers have been demo'ing it off the Southwest coast of the UK. It uses GPS to help you navigate around the wreck, whilst triggering various media and information that relates to the site -- all whilst you are 35 meters underwater."
Node spokesperson Neil Harris did not deny the report, but said the company could not confirm specific product plans. He did confirm Node's R&D team to be "actively prototyping" adaptations of its third-generation Linux-based NodeExplorer handheld for a variety of leisure sports activities, including "mountain biking, fishing, touring, sailing, and cross country walking."
Third-generation NodeExplorer
Node's currently available NodeExplorer v2 is based on an Intel XScale mobile applications processor. However, a new NodeExplorer v3 -- apparently still in development -- will move to an MIPS-based Alchemy processor clocked at 400MHz.
The third-generation NodeExplorer uses a MIPS-based Alchemy processor, rather than an Intel XScale processor
The NodeExplorer is a rugged handheld computer and GPS unit that works as one component of Node's location-aware interactive multimedia system. The system also includes an editor application aimed at helping users create interactive multimedia content, such as video clips, sound tracks, and slide shows. Another component is admin software aimed at associating content with specific locations and/or users, tracking user locations, and so on.
According to Harris, the company "license[s] this platform to partners who then deliver products to the tourism, sport, education, heritage, real estate, retail and industrial sectors. Whether at a tourist site, sporting event, or on an educational field trip, the ability to deliver mobile media direct to a user, depending on who they are, where they are, and what they are looking at, takes the experience further and deeper."
The NodeExplorer v3 has 128MB of RAM, a 320 x 240 TFT QVGA trans-reflective touchscreen designed for use in direct sunlight, and a "fast fix" GPS chipset with integrated internal antenna. It also features a splash-proof, rugged case and a large, quick-recharge battery.
NodeExplorer v3 has a ruggedized, splash-proof case with rubber grips and an ergonomic shape
Additional touted features include:- Supports 1GB to 4GB SD card storage
- 802.11b compliant wireless connectivity
- USB
- "Fast and efficient" Linux based operating system
- Claimed eight-hour battery life (playing continuous video)
- Claimed three-hour recharging cycle
Harris said that Node outsourced the NodeExplorer's MIPS Linux port, which is based on a 2.6.11 kernel. The remainder of the embedded Linux OS was developed internally by Node, and by Node's Delhi, India-based development partner. Other open-source software used includes MySQL Lite, Sun VRML, XFree86, and Python.
Harris noted that "Linux was chosen because it provided the best possible solution, both in functionality and reliability, via the lowest total cost of ownership. [Linux] has proved to be a major contributor, and we would recommend the investment to anyone else."
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