Jeepers creepers, sounds very loose. Hope it's finished in time for the trip.
Here's a nice explanatory paper on the shelters:
http://www.qub.ac.uk/geomaterials/weathering/newsletter/issue_1.pdf
Having worked with Maltese crew I can understand it fully. They have a wonderfully similar attitude to the spanish 'mañana', however it doesn't quite carry the same sense of urgency (-:
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