public void Parse(Encoder s)
{
pos = new Position();
pos.Parse(s);
time = new Timestamp();
time.Parse(s);
elevation = s.ReadSingle();
distance = s.ReadSingle();
heartrate = s.ReadByte();
b2 = s.ReadByte();
b3 = s.ReadByte();
b4 = s.ReadByte();
}