The example on the left shows a yacht that will avoid the dangerous wreck as long as the islets don't overlap. A fix is the ship's position on the earth at some given point in time. A fix is determined by the simultaneous intersection of LOP's. Often however, a triangle occurs when a third LOP is added in the construction. This indicates that there are errors involved in at least one of the bearings taken.
Bearings create more certainty about our position when they are perpendicular to each other.
Yet, bearings on distant objects bring about more uncertainty in our position fix as the sector widens. If moving fast you should not put any time between the bearings. In the next example we will plot our position fix by taking bearings at two light vessels just of the coast of Willemsen Land. To plot in the chart we will use a soft pencil and avoid drawing lines through the chart symbols. This to prevent damage to the chart when you have to erase the construction.