Abstract: In a system that transmits packets containing timestamps and information from a transmission site to a reception site at a transmission bit rate the packets may experience jitter, i.e. variable delay, during transmission. In such a case, the packets are temporally shifted relative to the timestamps and to other packets. Where the timestamp values are inserted into selected packets prior to transmission and that timestamp represent the value of the transmission site clock, the method and apparatus of the present invention substantially removes the jitter and adjusts the timestamp values prior to reception of the packets at the reception site. The present invention achieves this goal by receiving the packets at an intermediate site that has a local clock operates at a nominal frequency substantially equal to the nominal frequency of the transmission site clock and uses that clock as a jitter-free clock to correct the packets.

Abstract: The sailboat control device disclosed herein comprises one actuated by the pulling of a pin positioned therein, whose removal therefrom permits a spring controlled switch to be closed so that the position of the boat rudder is determined by the maneuvering of a wind vane on the boat. A line connected at one end to said pin and at the other end to the sailor on board causes the pin to be pulled or removed from the said device if and when the sailor should fall overboard. Movement of the wind vane and accompanying rotation of the vertical shaft to which it is attached effects movement of the rudder to make the boat travel in a direction not too far from where the sailor has fallen overboard.