Antares charts

Very Large scale wgs 84 electronic charts

Text Box: Caolas rahuaidh

Chart number 5638A

Surveyed June 2009 and extended July 2010


Use Tobermory.  Immediately outside the loch no adjustments are needed—heights and timings correlate perfectly with Tobermory.  The main loch has a slightly smaller range, by up to about 5cm at springs and a very slight lag—neither is sufficiently material to require adjustment.  In the inner loch there are much more significant differences: the range is up to about 15cm less and the timing of low water (not high) lags by about 45 minutes.  This means that at mid-tide there may be very significant height differences.  See the chart below.

Caolas Rahuaidh (pronounced ‘Rahoy’) is a channel approximately 0.5nm long and with a navigable width of some 50m at its narrowest point.  There are two drying rocks connected to the south shore by submerged reefs and a drying reef off the north shore about a third of the way in. It has a fairly flat stony bottom.  The tidal stream is reported to flow at some 2-3 knots at springs.

In our view the most attractive anchorages in Loch Teacuis, although not the easiest, are in the first and main section: on the SE side of Carna and in the top left hand part of this chart.


Passing through the ‘Rahoy’ narrows, the head of the Loch is also very beautiful and has the advantage of a large expanse of water of a suitable depth for anchoring: but beware the isolated rock and large shoal patch on the western side—see our separate chart.

If entering the channel from the west the key is to execute the surprisingly tight turn as you round the 2.6m drying reef extending from the north side in order to clear the 1.7m drying reef extending from the south side.  Should you be entering with a brisk flood (not recommended but we have done it) you need to pay a lot of attention the this.  As you follow the channel in a SEly direction it widens out but you must beware the easterly isolated rock drying 1.6m on the south side and the shoal bank on the northern side at this end of the channel: the deeper channel lies within 50m of the isolated rock.


NOTE: This website and material obtained from it are the copyright of Antares Charts © and may not be reproduced in whole or in part without express consent; use of all such material is subject to the disclaimers and conditions posted on this website and which may be changed at any time. For full Conditions click here.


NB Our chart CD does not contain such detailed tidal information for all locations

OPEN CHART:                            


GE   TIF    BSB     Mm                                 Setup

(You need the full package for the links to work properly)