GPS receiver has a 24 hour a day line-of-sight view to a ample number of satellites at any spot on the earth such that an individual with a GPS receiver is able to determine their own longitude and latitude to within several meters, in addition to their elevation. Dead-reckoning is well generally known as a way of guiding ships, whereby the recognized velocity and course of journey of a ship from a recognized place is used to calculate the present position of the ship. Adverse weather situations can even erode the accuracy of navigation by useless-reckoning. U.S. Pat. No. 5,781,one hundred fifty to Norris discloses a tracking device having an RF transmitter and ItagPro an RF receiver, each of which have a constructed-in GPS receiver. GPS position through an RF sign to the receiver, which in turn calculates the position of the transmitter relative to that of the receiver. "line of sight" from its antenna to a receiver for dependable transmission is subject to potential sign loss when operated on the surface of the sea.

Waves can obscure the direct line of sight of the antenna, and should are inclined to submerge the transmitting antenna. This is especially true for a transmitter that's worn or carried by an individual floating on the surface of the water. Transmission of a signal, resembling an RF signal, will be obscured by waves, and the transmitter will be topic to immersion, leading to wasted energy and signal loss. This ends in shortened transmitter battery life and decreased transmission reliability. Additional embodiments of the present invention can present an elevated degree of confidence that the location indicated for the individual or object is correct. GPS receiver, a sign transmitter to send a sign indicating a position of the target unit, and a processor to calculate an optimal time interval for transmission of the signal. GPS sign receiver, a compass to offer a reference course of the locating unit, a sign receiver to receive the sign sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator iTagPro product to show the range and bearing.

GPS receiver and a signal transmitter to send a signal indicating a place of the goal unit. GPS signal receiver and a compass to offer a reference route of the locating unit. An indicator displays the vary, bearing and confidence level. GPS receiver to determine a position of a system. GPS receiver to determine a position of the target unit. GPS signal receiver and a compass to offer a reference path of the locating unit. An indicator shows the range and bearing from the locating unit to the target unit. GPS signal at a goal unit to find out a location of the goal unit, receiving a GPS sign at a locating unit monitoring the goal unit to find out a location of the locating unit, calculating an optimum time interval for transmission of a signal from the target unit to the locating unit, the place the signal contains the GPS location of the goal unit, ItagPro transmitting the signal from the target unit to the locating unit throughout the optimal time interval, and iTagPro bluetooth tracker calculating a spread and best bluetooth tracker bearing from the locating unit to the goal unit.

GPS receiver and iTagPro bluetooth tracker a signal transmitter to ship a signal together with a position of the tracking unit. Preferred embodiments of the tracking device of the present invention can provide elevated reliability of signal transmission from a transmitter to a receiver, and elevated confidence in the accuracy of the signal being sent. FIG. 1 is a schematic illustration of a prior art private tracking system proven in use in a man-overboard situation. FIG. 2 is a block diagram showing the components of a private tracking system in accordance with the current invention. FIG. Three is a plan view of a most popular embodiment of a graphical show of the personal monitoring system of FIG. 2 . FIG. Four is a plan view of an alternate embodiment of a graphical display of the private tracking system of FIG. 2 . FIG. 5 is a block diagram displaying the parts of a private tracking system in accordance with an alternate embodiment of the current invention.

FIG. 6 is a block diagram displaying the parts of a private monitoring system in accordance with yet one more alternative embodiment of the current invention. FIG. 7 is a block diagram showing the parts of a private monitoring system in accordance with an extra various embodiment of the current invention. 2 is shown in FIG. 1 in a man-overboard state of affairs. Four having a GPS gadget 6 is shown at the crest of a wave. Eight having a GPS system 6 is shown on the trough of a wave. GPS units 6 embrace a transmitter that sends a sign 10 , e.g., iTagPro bluetooth tracker an RF sign, to a GPS gadget 12 on a ship 14 . GPS device 12 has a receiver to receive the indicators 10 sent by GPS devices 6 . Each of the GPS units ascertains its longitudinal and latitudinal position by buying alerts from GPS satellites sixteen that orbit the earth.