Mr. Diarmuid Ó Conghaile:

Going back to the point concerning what the charts are used for and the conditions in which they can be used, these are the VFR charts. They specify a minimum altitude for sectors, and they are not for use in poor visibility. In situations of poor visibility, instrument flight procedures are used and those are specified for given routes in and out of aerodromes. We have hundreds of miles of coastline, and thousands of miles when we consider all the inlets and so forth, and they are not designed for that.