Navigating

How To Cross an Ocean: Navigation

You have sails, rigging, and steering; congratulations, you have a sailboat and can go anywhere. Where should you go?

This is where navigation comes into play. When you set out to cross an ocean, you need to know where you are going. Navigation can be as basic as looking at the sun and stars, or as technologically involved as GPS navigational equipment.  

In the most basic forms, a compass can give you an idea of your direction, a time piece will give you an indication of your longitude, and a sextant can be used to measure your latitude. Paper charts can identify dangerous areas and give you guidance to reach your destination.  

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Many people view paper charts as they view a chart plotter, but this is not the case. A chart will not tell you where you are or where you want to go; it merely tells you where things are located in the world, you need to do the rest! This lack of convenience is out weighed by the fact that a paper chart will never "not work". You will never open a chart to find that your subscription has expired, or it's battery is low, or that an update has occurred and you need to log in to unlock your chart. A paper chart will always tell you where land masses are located as well as hazards and depths. 

Electronic charts are convenient, but can decide "not to work" when you need them most. We personally like to have electronic charts available to us because at any point we can look at them and know where we are, how fast we are moving, and where we are going. We understand that this is a convenience and also rely heavily on paper charts with traditional navigational equipment. I use a sextant to take a noon sight where I then calculate our position. Then I plot our position on the paper chart and record the data in our log book. After all that, I compare my findings with the electronic charts and see how close I was to the "true value". During the rest of the day, we enjoy the convenience of the electronic charts. One of our favorites is when we are approaching a waypoint. We will use the electronic charts to know when we reach that point and then use it to set our new heading. 

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Yes, we rely heavily on them for their convenience, but should they fail, we know how to navigate without them and how accurate we really are.  

Electronic charts are "Really nice to have" but not necessary. Paper charts and the equipment to use them is mandatory to safely get you across an ocean. 

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While actual navigational equipment is critical to a safe passage, there is always the "Oh crap!" situation where everything goes wrong and your goal is to simply make it to shore. Your paper charts are gone, your log book washed overboard, and the waves ate your sextant. This is where situational awareness becomes very important. Imagine you are in the Atlantic Ocean and you just want to get home. You know you are close to the East Coast of the United States. Who cares if you show up in Florida or Maine, just head West! You will come upon land and can find a sea buoy to guide you into a port.  

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What if you have a Captain Ron moment where the compass falls overboard? This is where general awareness is important. The Sun rises in the East and sets in the West. By night, the Moon follows this same pattern and Polaris sits squarely in the North. The higher Polaris is from the horizon, the further North you are, and using the Sun and Moon you can find your way West to get back to a shore. The same holds true in any ocean in the world. The stars can be used as guides through the night sky and the Sun and Moon can guide you for East and West. 

In a moment of desperation, sail in the general direction of the largest landmass you want to find and deal with landfall as you get closer. The important thing is to make it back to shore where you can then get help and get food and fresh water to survive. 

The Wonders of Flight

​After we sailed Wisdom across the Atlantic Ocean, we had to hurry home for a family reunion. The sail from the United States to the Azores took about 2 months, and the flight from the United States takes 4 hours and 40 minutes. Amazing!

To add to the spectacularness of the flight, I looked out at the window to observe whitecaps visible from our flying altitude, along with visible wave formations that stretch out as far as the eye can see. I was thinking to myself "man, those waves look nasty!" Even the clouds in the sky are perilous and would have been our signal to reef down as we tried to avoid encountering the storm.

When you are so removed, you can find it hard to mentally bring yourself into a situation. I was trying to imagine what the seas must be actually like on the surface and not from thirty-something-thousand feet away! I was allowed to stop imagining when I saw something familiar on the surface of the ocean. No, it was not a sailboat, they are much too tiny to see from my 5 mile high vantage point. It was a cargo ship, and it was being tossed around. From this high above, it was not possible to see the ship tossing, but it was possible to see the changes in the bubbles of his wake. As he would slam into a wave, white would show up around him and his wake exhibited these large and small white regions from waves since crossed.

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If that massive ship is being tossed around, then I know that the seas are violent and nasty on the ocean's surface. Like I said, flying will spoil you!

Choosing a Tack

When you are sailing towards a nearby destination, and the winds are light and variable, always choose the tack that has you closest to your destination. In this case, we are sailing from Horta to Angra do Heroismo. The winds have been from all directions and all intensities. Overnight it has varied from 0 to 18 knots, and from the North, South, and East!

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We are we're on a beat with NE winds as we were approaching Terciera when the winds became more easterly. We could continue on this same tack heading SE for about 10nm and then tack over and head North. This would work in theory, but it requires the winds to remain from their same direction!

What if you spend 3 hours lining up the perfect approach and then the winds shift again? The safe thing to do is tack frequently and often, keeping your yacht aimed in the general direction of "being closest". Yes, short tacks are inefficient, especially on a full keel yacht, but it is better to be "almost there" when the wind shifts than to be "really far away."

Passing Like Ships in the Night

We are now 36 nautical miles from Corvo, Azores, and I just spotted my first ship on night watch, for the past 22 days! The 4 other ships we saw were all during the day. Two passes 1.5 nautical miles from us, one 6 nautical miles from us, and the fourth was not visible but showed up on the AIS at 14.6 nautical miles from us.

This ship means much more to us than another vessel, this ship means that we are nearing a port and traffic is starting to coalesce. Those navigation lights signal more than a position and direction, they tell us that humans are over there and human contact awaits us in the very near future.