Petersburg Riga Dunrossness ... Aberdeen Yarmouth Valentia 1747.0 747,5 749.8750.8750.4 750.8750.4 755.1 753.4 751.7 754.2 753.4 756.0 757.0 760.0 760.5 759.5 758.2 761.4 763.4 763.0 763.8 748.7754.7