Mullingar Sailing Club
The course used for racing, (as defined by the Club Sailing Instructions), should be a Port course;

Triangle –Triangle – Beat / Run - Beat, (Start-1-2-3 , 1-2-3, 1-3-Finish).

The start line should be at right angles to the wind and is defined by the rescue boat and the Leeward buoy.

The centre of the race area should be North West of Church Island, as marked on this map of the lake. All of the course should be in water greater than 6m deep, particularly at the Jibe mark where capsizes are common. Remember that a GP14's mast is 6m long, if it sticks in the mud during a capsize, the most likely outcome is a broken mast..

Setting the course: 

Lay the Leeward buoy (3) and determine the average wind direction in relation to a landmark on the horizon.
Move up wind to a point where you can just see the Leeward buoy and drop the Windward buoy (1).

Use a Race Triangle to sight the heading to the gybe mark.
Drop the gybe mark (2) along this heading at a point where the edges of the Race Triangle align with the windward and leeward marks.

In light winds (Force 1/2) set a shorter course, if the wind drops you can shorten the course by anchoring the rescue boat opposite a mark and flying the blue flag.