The local mean time (LMT) of mer pass on any meridian is obtained from the Nautical Almanac. At the bottom of the right hand page of the three-daily tables is a small table entitled “sun-mer pass”. The time of mer pass for the three days covered by the page is contained in this table. Remember that the time indicated is in LMT. You will have to convert it first to Greenwich Mean Time (GMT) and then to zone time., ie