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Posts by cobaltduck‭

49 posts
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Q&A Are there reusable inflatable life vests (or PFDs)?

Yes, pretty much every Inflatable PFD is designed like this. To give some indication, have a look at this model: Mustang Elite 38 and its owner's manual. (Note: this answer is not intended to be ...

posted 6y ago by cobaltduck‭  ·  last activity 6y ago by System‭

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Q&A How can my neighbor encourage chipmunks to move away from her front-yard flower garden?

Had the same problem. Sprayed some "pepper wax" around the area. Problem disappeared. There are many brands available, as a web search for "pepper wax spray" will reveal. I've used whatever br...

posted 5y ago by cobaltduck‭

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Q&A Did any lighthouses provide directional navigation signals?

There is a of type navigational aid that partially provides some bearing information, and that is a range marker. Such markers occur in pairs, positioned close enough together to both be seen at t...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Why do hydration bladders top out at 3 liters?

It's all about weight. Water has a density of 1kg/L. Thus 3L is 3kg or about 6.6 pounds. That's equivalent to a brick on each shoulder when placed inside your pack. That's really not that much,...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Knot to tie handle of a bag

Fold each handle into itself and treat each as a single strand. Then just tie those two strands together in an ordinary square knot. Here is an example showing a similar bag, although much smalle...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Why might a larger peregrine falcon chick take longer to molt than smaller siblings?

Between the comments, continued observation of the Falcon-Cams, a little wiki-reading, and information on the site of the sponsor of the cams, I think I can confidently give myself the answer. Fir...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Is there an easy way to remember if you add magnetic declination to magnetic bearings or true bearings?

There's a mnemonic: Can Dead Men Vote Twice At Elections? The first letters in this sentence indicate the meaning: Compass +/- Deviation = Magnetic +/- Variation = True (Adding Easterly). This me...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Understanding the transition in USCG Personal Flotation Device (PFD) Labeling

In this question a couple years ago: What do life jacket ratings mean (Type I, Type II, etc)?, we see the traditional types many of us learned about in Boating Safety courses, or in Scout/ Youth ca...

1 answer  ·  posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A How are mountain lion populations estimated?

I honestly do not know for which individual species this method has been used, and in particular whether it has been used for Puma concolor, but a general method that is frequently used for populat...

posted 5y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A What are the differences between a lighthouse and a light station in terms of the specific purpose?

First, I would like to give a definition of a smaller term, that of just "light." For this, I turn to the U.S. Coast Guard. In this brief PDF of the Aids to Navigation System, we get a couple hel...

posted 6y ago by cobaltduck‭

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Q&A What is head/lift indication in a digital compass on a sailboat?

Let's start with the terms lift and header. Suppose I want to go that way, whichever direction that happens to be. If the wind is coming from that way, then I can't do it, at least not on wind po...

posted 6y ago by cobaltduck‭  ·  last activity 6y ago by System‭

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Q&A What is the best practice to secure a 17ft open canoe to the roof of a vehicle?

This is difficult, since every boat/ vehicle combination is unique and so there is no one "silver bullet" method for rigging that will work for all. However, there is one principle that I apply to...

posted 6y ago by cobaltduck‭

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Q&A When do boats have the right of way?

To get the complete answer, you would need to study up on your Navigation Rules, International and Inland, also known as NAVRULES and as the 1972 COLREGS (Collision Regulations). This book is the ...

posted 8y ago by cobaltduck‭

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Q&A Double half hitch, versus two half hitches?

First, a note on terminology. There are several groups of knots that have a certain what I call topology. When that topology in the rope is tied around a fixed object, the resulting knot has one ...

posted 7y ago by cobaltduck‭  ·  last activity 7y ago by System‭

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Q&A How does water depth affect swimming safety? Why do signs, especially in the UK, say "DANGER: deep water"?

One thing not yet mentioned is quickness and ease of rescue. In my younger years, I was a trained lifeguard, and though my certification is long expired, I remember most of the concepts. A strugg...

posted 7y ago by cobaltduck‭

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Q&A How do you aim a signal mirror?

This answer applies only to signal mirrors which are two-sided and have an aiming hole in the middle, which should be the case with any good signal mirror. My answer will partially duplicate a pri...

posted 7y ago by cobaltduck‭

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Q&A Is there some sort of portable slow CO2 emitter that can be used in conjunction with a bug zapper?

Burn an ordinary paraffin candle. There are several claims floating around that describe how some well-intentioned people are actually increasing their total CO2 emissions, by turning off their el...

posted 7y ago by cobaltduck‭

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Q&A How do choices in design of a paddle-craft influence its handling characteristics?

If you imagine cutting a canoe or kayak along each axial plane, you get three shapes. If you cut along the waterline and look down from above, you get the plan. Cut thwart-wise at the widest poi...

2 answers  ·  posted 7y ago by cobaltduck‭  ·  last activity 6y ago by System‭

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Q&A I've just been bitten by a rattlesnake; how, exactly, do I "keep calm"?

Eventually some part of your brain is going to start thinking, "Holy (expletive), Rattlesnake! I'm gonna loose an extremity! I'm gonna die! What's going to happen to my family? Why did I even co...

posted 7y ago by cobaltduck‭  ·  last activity 7y ago by System‭

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Q&A Could this year's unusual warmth harm turtles?

I currently live about 25 miles northeast of Cincinnati, Ohio, USA. On February 20-21, 2015, a fairly significant snow and ice event struck the area. On February 29-March 1, 2016, a smaller event...

2 answers  ·  posted 7y ago by cobaltduck‭  ·  last activity 5y ago by System‭

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Q&A Can a compass be thrown off by its surroundings?

The OP provides an nicely detailed self answer, but I would like to add that when such areas exist, they are of particular concern to mariners1, and are therefore well-documented for nautical navig...

posted 8y ago by cobaltduck‭

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Q&A What to look for on the site of a geocache?

I've been geocaching for 12 or 13 years. I'm no power cacher, but I do have a few hundred finds. But you know what? I also have a couple hundred no finds. Some may have been missing at the time...

posted 8y ago by cobaltduck‭

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Q&A What do life jacket ratings mean (Type I, Type II, etc)?

There is already an answer that gives the basics, and this official page from the Coast Guard adds several details, so here is my summary. The system of ratings for Personal Flotation Devices (PFD...

posted 8y ago by cobaltduck‭  ·  last activity 8y ago by System‭

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Q&A How to retrieve a bear bag when hung with Pacific Crest Trail (PCT) method

It seems like you simply need to reverse the procedure you give. Since you initially had to pull the rope up far enough to tie the stick in to it, you can still pull it back up to the same point i...

posted 8y ago by cobaltduck‭  ·  last activity 8y ago by System‭

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