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Websurf is designed to provide a range of astronomical information in both pre-calculated and dynamic forms. Our Info option provides links to access Astronomical & Calendarial Sheets and maps for Solar & Lunar Eclipses, First Sighting of New Moon data and Time Zone maps. The dynamical information covers rise/set times, azimuth and altitudes, Islamic Prayer Times, First Sighting of New Crescent Moon, Moon Phases, Equinoxes & Solstices and an Almanac giving solar, lunar and planetary data for a specific location and time.

Websurf will undergo an upgrade at the beginning of 2010. Please use the Feedback option to report any problems. This site should be regarded as a work in progress and options available now may be replaced in the future.


The information provided on this site is Crown Copyright. You may view and/or download this information for personal use only. The information provided here may not be sold, either in whole or part, reproduced, stored in a retrieval system or transmitted in any form by any means, electronic, mechanical, photocopying or otherwise without prior permission of HM Nautical Almanac Office. Permission to reproduce this information should be sought from the UK Hydrographic Office, Admiralty Way, Taunton, Somerset, TA1 2DN, United Kingdom.

Every reasonable effort has been made to ensure the quality of the information provided here. However, HMNAO does not accept any responsibility whatsoever for the accuracy and/or reliability of the information as displayed or printed on the user's equipment.

I accept / I do not accept the conditions of use.

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Download Acrobat Reader Information can be downloaded in the form of PDF files from both the pre-calculated and dynamic parts of Websurf. It can be viewed with Adobe's freely available Acrobat Reader available for a variety of platforms.

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Websurf is a service of H.M. Nautical Almanac Office.
© Crown Copyright 2010