Approach maneuver when the shipwrecked man is not seen.
Exploration by sectors: It is more efficient when you know exactly the position of the shipwrecked person and when the search area is small. In this search, whether it is a member of our crew, or if it is another, the first is to mark (with a buoy or on the plotter) a starting point or datum, which will be or the point we have of drop reference or the data that you provide us.
The technique tries to explore radially from the datum with turns from 120º to starboard being the route for small boats a mile or so. Once the 3 sectors have been crossed, the course changes from 30º to starboard from the datum and the same procedure is used to explore the next sector.
Square spiral exploration: This method is the most effective when it is known that the shipwrecked person is located within relatively close limits. The use of the radar or the plotter can be very convenient since leaving in the datum any detectable object (eg a radar reflector) it is possible to carry out the spiral sweep around the datum separating each turn from it the width of the street of the sweep.
Scanning in parallel scan: Used to search a large area when the location of survivors is uncertain
We will see how navigating to "the visual" is more effective than following only the theory of change of course and follow the needle course. Likewise, for this activity each participant will carry out their search area (by time or by miles) similar to the one attached. Let each one choose if he prefers by "square spiral" or by "exploration by sectors" or "parallel traces". For the activity, each patron will "your" search and also perform the sotopattron function of another patro (indicating their next maneuvers)
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