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Tag: maps

Return of Bert, swim plan

In the immortal words of Dave Barra, anything worth doing is worth over doing. This is the 24-page swim plan for today’s swim.

The plan!

It covers the basics of communication protocol, course description, vessel traffic avoidance, emergency and evacuation procedures, and rules. Thanks again goes to VTS Sector Puget Sound (Seattle) for taking the time to entertain this, and additional thanks to WSDOT Ferrys for doing to same.

Return of Bert, actual route

Step one: jump in. Step two: turn left and go off course.

The actual route for this swim does not match the shortest route. The shortest route, at 18.8 miles, heads north from the start through the East Passage. My route is over 2.6 miles longer, and goes left around Vashon Island.

Right now, I’m either regretting this decision, or laughing to myself that it is just crazy enough to work. Either way, here’s the logic behind it:

During Bert Thomas’s 1956 swim in the opposite direction, he swam about nine hours before getting stopped by the tide and finally finishing seven hours later. That’ll happen in the East Passage, where the ebb and flood of the Sound creates noticeable currents, and complicated eddies. While it sounds like a complicated, exciting challenge to hop between shores, tuck in behind spits of land to fight the tide and then burst out at the right moment, when one adds in the shipping lanes running through the East Passage, more likely it would become another Tappan Zee incident (see Stage 6) where I’d be constrained to unfavorable water and left to fight it out.

Instead, I’m going to avoid shipping traffic and, if I’m right, the tides altogether.

Now not far west from the start along the shore of Point Defiance, regular swims with Melissa have taught me that the current there always pushes west. And Melissa’s birthday swim taught me that a strong clockwise eddy lies just north in Dalco Pass, midway between Vashon and Tacoma shores. So I’ll ride that current west from the start, heading out to the mouth of the Narrows to meet a ripping ebb tide pushing north into Colvos. This part is a bit of a gamble; if I swim for the Gig Harbor Light fast enough, I should be pushed north into Colvos on the backside of Vashon.

And that is where it gets beautiful. Colvos they say, by some magic of oceanography, always has a north current. So I’m adding a few miles to the swim in hopes of avoiding a seven-hour delay like Bert had.

At the top of Vashon, we’ll ride the current as far north as possible, getting above the ferry lanes and preparing to swim due east against a flood tide pushing south.

shortest-route-planned

Pend Oreille swim – route

Tomorrow evening, Elaine Howley will embark on a 32.3 mile swim across the length of Lake Pend Oreille in northern Idaho. She will begin in the southwestern most part of Buttonhook Bay, Farragut Park and swim up to City Beach Park in Sandpoint. The swim will be done following the Marathon Swimming Federation standard rules for a solo swim.

This route poses an interesting challenge in declaring an official distance, since the shortest straight line between start and finish includes several mountains and a few train tracks. This route presented ┬áhere is best described as the “shortest swimmable route.” It takes into account the local terrain and turns its way across the lake using the shortest distance between multiple points. Distance from shore along the bends in the route vary between 25 and 150m.

Pend Oreille route

Precise start and end locations are yet to be determined, however deviations of up to 250m make no significant difference to the overall course length.

The Google Earth .kmz file is available for your use.

Alki Beach swim map

SwimAlki