Charting Shark Island
Aug. 28th, 2017 07:29 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
Back to Shark Island again, this time on a mapping expedition with the sailing club...

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

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

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

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

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

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

When the lines meet is called a "resection".

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.

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

Not a bad effort!

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

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

Before finally catching the ferry home.


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

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

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

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

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

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

When the lines meet is called a "resection".

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.

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

Not a bad effort!

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

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

Before finally catching the ferry home.
