[personal profile] khiemtran
Back to Shark Island again, this time on a mapping expedition with the sailing club...

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It was a bit windier on Sunday, but we took the ferry and had a smooth ride from Circular Quay.

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First, the team of young explorers scouted the island for possible Mirror landing sites...

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Then they began to investigate some of the mysterious structures on the island.

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The amenities are sparse on the island, but the adventure rides are awesome!

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After lunch, it's time to begin charting the island. First we need to take bearings from landmarks around the harbour...

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Then plot them on our charts, after compensating for magnetic declination (+13 degrees in Sydney).

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When the lines meet is called a "resection".

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Three lines gives you a "cocked hat" (a triangle which indicates your approximate position). The circle is Liem's original guess at the location of the island.

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The kids did really well on their first attempt...

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Not a bad effort!

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After the mapping exercise, time for more exploring...

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The wind is quite strong now, and we watch the older kids out in their 420s.

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Before finally catching the ferry home.

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khiemtran

August 2021

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