Abstract: Examples and embodiments provide systems, methods, and apparatus to provide information and instruction to those involved in Martial Arts training via a mobile device, such as a smartphone. A mobile application provides various training functions including, by limited to a handbook; flash cards; stretching, fundamental skills, advanced techniques, and sparring practice routines. The routines can be preloaded within the mobile application and/or specifically created by the student or instructor. Routines can be executed at user selected rates and presented audibly and/or visually as elected by the user. The mobile application can be used individually and/or in a class room setting.

Abstract: A navigation system and method is provided for use by a snorkeler. A navigational antenna (31) is fixedly coupled to the snorkeler in a manner that positions the antenna above the waterline when his head is face down at the waterline. The antenna communicates with a display (41) to provide the snorkeler with navigational information. A GPS signal receiving antenna is employed in the illustrative embodiment and is attached to the breathing tube (23) of the diver's snorkel (20). The navigational signals received by the antenna are conveyed to a handheld GPS receiver (40) via a GPS re-transmitting antenna. An externally operable pushbutton (56) allows the snorkeler to switch between multiple screens to guide him through the snorkeling site and provide him with information relative to his immediate location.

Abstract: A navigation system is provided for use by a snorkeler. A GPS signal receiving antenna (31) is coupled to the snorkeler in a substantially fixed spatial relationship and communicates with a display (41) to provide the snorkeler with navigational information. In the illustrative embodiment, the GPS signal receiving antenna (31) is attached to the breathing tube (23) of the diver's snorkel (20) and communicates with the display (41) of a handheld GPS receiver (40) housed in a waterproof case (50). The GPS signals received by the GPS signal receiving antenna (31) are conveyed to the handheld GPS receiver (40) via a GPS re-transmitting antenna (35) housed in the same waterproof case (50). An externally operable pushbutton (56) allows the snorkeler to switch between multiple screens presented on the display (41) to guide him through the snorkeling site.

Abstract: Provided is a system that allows navigation by GPS while underwater by locating the antenna above water and the display below water. In one embodiment, the GPS antenna is attached to a tow-able buoy having a diver-down flag. In another embodiment, the GPS antenna is carried by the diver and released to float to the surface when the diver wishes to navigate. A preferred embodiment uses a handheld computer to display GPS data, and can be expanded to also calculate and display depth and decompression data, and to provide for further expansion and integration to include other devices.

Abstract: The invention provides a diver with a system that allows navigation by GPS while underwater by locating the antenna above water and the display below water. In one embodiment, the GPS antenna is attached to a tow-able buoy having a diver-down flag. In another embodiment, the GPS antenna is carried by the diver and released to float to the surface when the diver wishes to navigate. A preferred embodiment uses a handheld computer to display GPS data, and can be expanded to also calculate and display depth and decompression data, and to provide for further expansion and integration to include other devices.