Water usually doesn't present a uniform acoustic transmission medium because the velocity of sound propagation and different signal transmission traits fluctuate with water temperature, salinity, and depth (or stress) every of which may fluctuate with dive location. Therefore, the transmission time between a transmitting unit and a receiving unit range with the location of a dive (i.e., based on the water chemical makeup) and typically even with a deliberate depth for iTagPro portable a dive. Such units, affordable item tracker methods, and methods ideally would be tailored for use in varying dive places and beneath different water situations and can be readily tailored for use with a number of divers and dive groups of varying skills and expertise. 5 ft for unskilled divers or for ItagPro harmful circumstances whereas a fifty-foot, hundred-foot, 200-foot, and often increased safety range could also be set for skilled divers or iTagPro portable relatively protected diving situations. An alert may be automatically or manually transmitted to and from the dive grasp when the space is exceeded.

An alarm is activated when the distance situation is met by the discovered distance or when activated by a user. The gap is then discovered from the measured time. FIG. 1 is a block diagram generally illustrating the system of the current invention. FIG. 2 is a flow chart generally illustrating the strategy of the current invention. FIG. Three is a block diagram illustrating in additional detail one embodiment of the means for discovering distance in FIG. 1 . FIG. 4 is a circulate chart illustrating in additional element the step of discovering distance in FIG. 2 . FIG. 5 is a block diagram illustrating in additional detail one embodiment of the means for discovering distance in FIG. 1 . FIG. 6 is a circulation chart illustrating in more detail the step of discovering distance in FIG. 2 . FIG. 7 is a block diagram illustrating in more detail one embodiment of the means for discovering distance in FIG. 1 .

FIG. 8 is a move chart illustrating in additional detail the step of discovering distance in FIG. 2 . FIG. 9 is a front view of a diver communication device of the present invention illustrating a display surface exhibiting dive time, present separation distance settings, current message from dive companion or dive grasp, and communication frequency along with other options of the diver communication device. FIG. 10 is a side view of the exterior of the diver communication system of FIG. 9 illustrating the battery compartment. FIG. 12 is one other practical block drawing similar to FIGS. 11A and ItagPro 11B illustrating using a dive master communication machine for concurrently monitoring divers in two separately communicating dive teams which are diving utilizing totally different safety distances. FIG. 13 is a entrance view of a dive master communication machine or grasp controller illustrating options much like the diver communication gadget of FIG. 9 and in addition illustrating features facilitating monitoring and speaking with multiple diver and dive teams.

Additionally, the diver communication system and methodology is useful for permitting a number of dive groups diving within a single dive space to communicate with each other with out inflicting communication issues. This discussion includes an explanation of the usage of preset separation distances and the computerized transmission of alert signals when the determined distance between two devices exceeds the preset separation distance for the 2 units. An essential aspect of the invention is the combining of multiple features in a single diver communication machine and the way the distinctive mixture of those functions facilitates effective communication between diving partners and, significantly, between three or more divers inside a dive group (even when diving in proximity to other dive groups) and between a dive master and divers in a number of dive teams. FIG. 1 illustrates a system 2 for alerting when a first gadget four and a second machine 6 are separated by a preset distance. System 2 consists of a method 8 for discovering a distance 10 between first system 4 and a second gadget 6 , a comparator 12 , and an alarm 14 .

System 2 may also embrace various additions akin to a user input interface sixteen and a storage system 18 for storing a preset distance condition 20 or executable instructions. First device 4 and second gadget 6 may be of any shape or design. System 2 could have a variety of makes use of with each use having its personal desired shape. 2 and second device 6 are conveniently embodied in a shape to be worn on a diver's wrist or itagpro tracker attached to the divers Buoyancy Control Device (BCD). Additionally, when utilized by divers, it may be desirable for first device four and second machine 6 to include conventional diving options reminiscent of a dive time indicator or different indicators useful for divers. 4 and second gadget 6 are being described as separate units. Four and second machine 6 each embody all of the parts of the opposite system. In that embodiment, each of two or extra divers can be ready to keep monitor of the gap between them.

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