Written by Amit Sharma
Different search patterns:
EXPANDING SQUARE SEARCH
- Most effective when the location of the search object is known within relatively close limits.
- The commence search point is always the datum position.
- Often appropriate for vessels or small boats to use when searching for persons in the water or other search objects with little or no leeway.
- Due to the small area involved, this procedure must not be used simultaneously by multiple aircraft at similar altitudes or by multiple vessels.
- Accurate navigation is required; the first leg is usually oriented directly into the wind to minimize navigational errors.
- It is difficult for fixed-wing aircraft to fly legs close to datum if 5 is less than 2 NM.
About the author
Amit Sharma
Graduated from M.E.R.I. Mumbai (Mumbai University), After a brief sailing founded this website with the idea to bring the maritime education online which must be free and available for all at all times and to find basic solutions that are of extreme importance to a seafarer by our innovative ideas.
6 Comments
What is “S” stands for in expanding square search
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Which search to be carried out if time elapsed of 4 hrs. Thanks and best rgds
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I’m a mariner ,my English is not strong . Please explain navigation in Hindi too.Your effort will help north indian mariners to help navigation easily.
Thanks in advanceReply
i can explain in hindi please do call me on 7000722606
you are just too good. this is a welcome development.
your site is helping Mariners all over the world.
thanks
Reply
How is the initial distance between legs determined in an expanding square search?
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