A 32km day trip round the Garvellach islands from Ellenabeich on Seil. August 2010.the NW coast of Eileach na Naoimh.Tidal streams from Insh Island to the north end of the Sound of Luing:+0430 HW Oban (-0100 HW Dover) north-east going flood begins.-0155 HW Oban (+0500 HW Dover) south-west going ebb begins.The spring rate is 6-7 knots through the islands at the N end of the Sound of Luing. On the