Antares charts

Very Large scale wgs 84 electronic charts

Download printable pdf of current Corrections and Cautions here


All Cautions and Amendments will be listed here but if significant errors are found in any of our charts we will make replacements available to registered users. For printable versions of each year’s Cautions and Corrections see below.


There are two important corrections and one caution relating to our current 2018 charts (please let us know if/when you find more errors!):


May 2018: Correction: Caol Scotnish: our 2018 chart indicated an area to avoid, where we had received reports of an uncharted rock. We have now surveyed the rock but it is just outside the marked area. A full replacement chart will be included in our next set and meanwhile an enlargement of the affected area can be downloaded here. You may wish to keep it with you—it is not georeferenced for use in plotters but when used with our original chart will enable you to avoid the rock, which is only about 3m across and which we understand has been marked with a yellow buoy.


June 2018: Correction: Caolas Ban, Gunna. We show a c.100m wide channel leading out to the NW, with least depth of 0.3m and hence only usable by keel boats at around HW and then only in the right circumstances. In the Commentary we advise that Caolas Ban is untenable as an anchorage at springs due to the strong tidal streams and suggest that this NW channel should only be used to leave, rather than enter the area and only then in very settled conditions with no swell. Within this reasonably wide but shallow channel we show a much narrower channel on the S side of the central reef that is less than 20m wide but about 3m deep. Although we had not said so explicitly, we regard this as far too narrow to use in a keel boat in such an exposed area where the sea is always, at best, ‘restless’. We have re-surveyed this whole area with some difficulty, as the tidal stream sets up its own swell, and provisionally suggest working on a revised least depth of 0.2m drying. We also found the 20m wide ‘sub-channel’, in the S part of the main channel, to be slightly longer, with the central reef extending about 20m further to the SW than we currently show it. However, we now advise strongly that this narrow ‘sub-channel’ should on no account be attempted in a keel boat. We still see no reason why the main 100m wide channel should not be used at around slack HW on those rare occasions when there is no incoming swell, subject to draft considerations and always leaving a good margin. Our revised chart will be published in our next set.


January 2019: Caution: Ardmore Islands: We show a rock with a 2.1m sounding on the SE side of the N entrance at 55deg 40.72N, 6deg 01.34W. It has been reported that the least depth over this rock is much less than 2.1m. We will re-survey it as soon as possible but sensible navigators will give it a wide berth whatever its depth.


Technical issue on one 2018.1.1 chart—Polar Navy users only—see bottom of this page


The following cautions have arisen during our 2018 surveys and relate to areas for which we have not yet published a chart:


May 2018: Channel inside Eilean Beag, approaching Bagh Gleann nam Muc (Bay of Pigs) from the Corryvreckan. UKHO chart 2326 (Loch Crinan to the Firth of Lorn) shows a sounding of 3.9m. We measured the depth at that point as less than 1m (possibly as little as 0.5m - we have yet to establish an appropriate datum as the area is strongly affected by the Corryvreckan tidal streams). On the other hand, the 1.2m sounding is much further out from the shore than it should be due to a cartographic constraint imposed by the scale of the chart. The reality is that there is a straight, deep passage if you keep at least 30m but no more than 100m off the HW line on the Jura shore, whilst the ‘less than 1m’ rock (shown as 3.9m) is 130m off the Jura HW line.


May 2018: Druimyeon Bay, Gigha. UKHO chart 2475 (Sound of Gigha) shows the south end of the bay drying more than a quarter of a mile but still leaving an area for anchoring where there is shelter from wind and swell from the SE. This area currently has a 2.7m sounding in the middle of it with ‘Wd’ underneath. In fact the weed is on a collection of rocks varying, provisionally, from 0.6m to 1.5m that effectively makes the south east half unusable. The western half of the area appears to be completely clean with good holding.


May 2018: Caolas Gigalum, Gigha. UKHO chart (2475 Sound of Gigha) shows a rock marked ‘PA’ on the east side of the channel. Its position is accurate and depth, provisionally, 0.3m. But there are also rocks to its east, under the letters ‘PA’, provisionally of 0.2m and 1.1m. It is possible to anchor north or south of these rocks but it didn’t seem at all attractive given the strong tidal streams that flow through the area: in the event of easterly wind or swell it is much better to seek shelter in the area of Druimyeon Bay described above or on the west side of Gigha.


June 2018: Balephetrish Bay, North Tiree. UKHO charts 1796 and 1778 show this as a wide, clean bay sheltered by numerous reefs and islets on either side. The charts show the usual contours and two spot depths of 2.6m and 1.8m. However, both charts are at a scale of 1:100,000 and hence not suitable for close-in pilotage. Perhaps unsurprisingly we found the bay to be significantly more complex and in particular with a 0.2m rock to the E of the 2.6m sounding, between it and the dotted boundary (56deg 31.490N, 006deg 52.651W), and a 1.5m rock to the SW of the 2.6m sounding (56deg 31.406N, 006deg 52.997W).


June 2018: Port Ruadh, Tiree, on the SW side of Gunna Sound. We were surprised to find three ‘hittable rocks’ in this much used anchorage. The following refers to UKHO chart 2474-3 Gunna Sound. A rock of 0.4m (provisionally) lies at the N end of the bay on the NW edge of the G of ‘Ghreasamuill’ (56deg 32.880N, 006deg 44.206W); a rock of 1.3m (provisionally) lies almost on the 5m contour due north of the 3.8m spot sounding (56deg 32.735N, 006deg 43.957W); a rock of 1.6m (provisionally) lies immediately to the E of the ‘2’ of the 3.2m sounding (56deg 32.663N, 006deg 44.168W).


June 2018: Churchton Bay, Raasay.  There are three visitors’ moorings in the larger part of Churchton Bay, to the SE of the ferry breakwater, that appear to be unmaintained and hence should probably not be used. The SE-most buoy lies less than 40m W of a 0.7m (provisionally) rock. This is immediately to the N of the 3.8m sounding on UKHO chart 2534-4 (57deg 20.881N, 006deg 4.571W).


July 2018: Dun Mhuilig Bay, Loch Craignish. There is a 1.5m (provisionally) uncharted rock c. 100m SW of the islet that forms the E tip of the bay’s entrance. The position of the rock is approx. 56deg 9.290N  005deg 34.260W


The 2017 set of 373 charts has been superseded by the 2018 set of 461 charts. We recommend that you no longer use the 2017 or earlier sets: some of the 2017 charts have been extended and a few have been subject to minor changes that make continued use of the originals undesirable.


Many of our cautions have led to corrections to UKHO charts but in case you have older official charts the full lists are available below:


For all cautions arising during 2018-19 click here


For all cautions arising during 2017 click here


For all cautions arising during 2016 click here


For all cautions arising during 2015 click here


For all cautions arising during 2014 click here


For all cautions arising during 2013 click here.


For all cautions arising during 2012 click here.


NB  Hydrographic surveying and cartography are not precise sciences. There will be errors and misrepresentations on our charts as well as others. Do read the sections on ’Making the charts’, ’Using the charts’ and the ’Conditions’. Take great care at all times but especially if away from the routes described by the pilot books. 



Technical issue affecting Polar navy users only (of whom we believe there are very few): one chart in the 2018.1.1 set (Sound of Shuna, South Channel, edition 1) does not georeference correctly and cannot be used in plotters. The same BSB version seems to be fine in all other software we are aware of! A corrected version of the chart can be downloaded here. Firstly delete the existing chart of the same name—both the .bsb file and the .kap file  - from the BSB folder. Then click on the links below and select ‘Save’  to a temporary location of your choosing. Then unzip the folder (’Extract all’) and copy the two files into the BSB folder …/Charts/BSB for PC and Mac plotting software 


South Shuna corrected BSBs

Corrections & Cautions

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.


Printed version of Antares Charts


Several people have asked if we could offer printed versions of our charts. We have looked at this very carefully and, at one time, thought it would be something we could do but have concluded that it would be a huge amount of extra work for us and expense for you for little benefit...


One of the main problems is scale. Some charts could just be printed much as they are but with others the lettering (soundings, place names, etc) would be too small to read. In these cases we would have to re-design the chart with less detail and then include a zoomed-in version of the tricky bit(s), with the full detail. Needless-to-say, this is a time consuming process!


The waterproof paper we found was really excellent and the quality achievable was superb but it came at a price. And with a very uncertain level of demand and ever increasing numbers of charts it would not be possible to commit to a large print run. So a set of c.200 charts would cost over £100. And with over 500 charts next year it would be quite beyond what almost anyone would be prepared to pay.


We will keep it under review. Meanwhile, we are assisting Edward Mason and the CCC Imray Sailing Directions with their plans, many of which are now based on our charts. And we will stick to what we believe is the best way forward, namely providing material for the increasingly wide range of inexpensive and reliable electronic devices available to us all.


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