Sunday, August 05, 2012

Depth Sounding, Old School...

My uncle Bob dropped off this pretty little relic of the past yesterday.  It might not look like much, but this device is a sounding lead and it was used for navigation by the ships of yesteryear to take bottom samples and, most importantly, take depth readings.  As with many early innovations, it is perfectly simple in it's design and execution: a three pound weight (or 'lead' as they are called) is attached to a line.  The weight (which has a hole on the underside to collect bottom samples) was then cast over the side of the boat by a "leadsman" and when it hit the bottom, he would yell out what depth read on the line.  Knots in the line mark certain depths in fathoms and "Mark twain" ('twain' being 'two' in Old English), for example, was the call for two fathoms (and the inspiration for the pen name of Samuel Clemens, himself a former Mississippi river pilot).  A lead much like the one pictured was what Columbus used to bring his ships to the shore of the new world.  A similar contraption made sure Magellan's ships didn't run aground.  This little pice of metal and line had quite a responsibility.

Items like this are a nice reminder that before we all became so reliant on technology and obsessed with gadgets, there was another way.  While I certainly benefit from and love technology, I do tend to think that the ease in which we do everything nowadays and our dependence on the push of a button is atrophying our minds to think in other ways...I think that's why I love cruising - because no matter how many gadgets you have, there will come a time when you must revert to some old school logic.  What do you think?

Love
Brittany, Scott & Isla

14 comments:

Princess Aboard said...

We lost all electronics about fifteen miles from the Dry Tortugas n had to come n blind about a wk ago. I think its good to b ready for situations like that.

NatGeoWannaBe said...

I think it's wonderful to "revert" every now and then. Gadgets/technology might be useful (and fun) - but they've also become a huge time suck (as evidenced by the number of hours I spend on facebook)....not to mention occasionally crippling (ever ask the 'normal' teenager to read a road map?)

The best moments in my life were the ones spent trekking/camping the woods with no electronics whatsoever.

Jake DiMare said...

The guy who taught me to sail and navigate used a spinner log, compass and parallel rule. The one piece of technology on his boat besides the marine radio was a depth finder...But we learned to use the sounding lead as well.

He even taught us celestial navigation, but I've since forgotten how. I hope to learn again...

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Unknown said...

The most reliable essay writing help deep-sea sounding machine was designed and patented by (Lord Kelvin) himself. I think it’s good to be ready for situations like that.

Shaikh Zahid said...

Soundings may likewise be taken to set up the boat's situation as a guide in route, not simply for wellbeing. Soundings of this sort were Car Electrical Repair Dubai typically taken utilizing drives that had a wad of fat in a concavity at the lower part of the plunge. The fat would raise some portion of the base dregs (sand, stones, mud, shells) and permit the boat's officials to all the more likely gauge their situation by giving data valuable to pilotage and mooring.

Anonymous said...

Conventional expressions for soundings are a hotspot for typical statements in the English language, remarkably "profound six" (a sounding of 6 distances). On the Mississippi River during the 1850s, Accounting System Software In Dubai the leadsmen likewise utilized older style words for a portion of the numbers; for instance rather than "two" they would say "twain". Accordingly when the profundity was two spans, they would call "by the imprint twain!"

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The fat might improve a few portions of the bottom dregs (sand, stones, dust, shells) and permit the boat's officers to all of Diesel Trading Company In Abu Dhabi much more likely gauges their scenario via giving information treasured to pilotage and mooring. Wind vacationer discussion board has been doing an awesome task for the reason that its inception. Preserve shifting closer to the purpose is the important thing to success.

Shaikh Ali said...

Ancient mariners used sounding-weights, the oldest recognized marine navigational device, not best to decide the depth of water, but Production Houses In Karachi also to carry up samples of the bottom, comparing the result with their knowledge of coastal geography and river behavior.

Abdullah Sheikh Bin Zaid said...

Soundings will also be taken to establish the ship's function as an resource in navigation, no longer simply for safety. Soundings of this kind have been commonly Dubai Accounting Software taken using leads that had a wad of tallow in a concavity at the bottom of the plummet. ... If the plummet got here up easy, it supposed the lowest became rock.

Anonymous said...

Soundings may moreover be taken to set up the boat's circumstance as a guide in course, not just for prosperity. Soundings of Audi Service
this sort were Car Electrical Repair Dubai ordinarily taken using drives that had a wad of fat in a concavity at the lower part of the dive. The fat would raise some bit of the base residue (sand, stones, mud, shells) and grant the boat's authorities to all the more probable check their circumstance by giving information important to pilotage and securing.

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