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Need to be cautious about numbers from the internet; in this case, ocean currents vary not only due to storms, but also location, day vs. night, open seas vs. closer to land, etc. That's why it is important to have some method other than Dead Reckoning to determine position from time to time...

Ocean currents & winds impact DR on ships; however, combined with periodic celestial navigation locations DR can be relatively accurate.

Yes, DECCA. I identified an area in the "Atlantic Operating Area" (not the Bermuda Triangle, but near-ish) where DECCA didn't work. NAVSEA didn't believe me, but I pushed so we took a tech (reluctant civilian who didn't believe me and also didn't like being on a ship) with us on one trip: as...

I posted on Clough42's Discourse suggesting that James give it a try (the filament, not the pool).

Sorry

You guys need to get out more: https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwv

But better than having to pay to get rid of it.

I’ve got so much old tech that I’m good for a couple of years (can recycle all you want, but only get one $5 per month so I stretch it out).

Welcome from Pennsylvania!

Some Tips from Eastwood on Managing 10mm Sockets

Having experienced storms in the Caribbean and North Atlantic on this ship I can guarantee we didn’t have any stabilization system. The Satellite Communications Antennas did have servos, but they were controlled by the satellite signals not gyros (it was nigty watching the antennas move during...

In port (where I could see a horizon) I was able to get within a couple of hundred yards. At sea IIRC matched SatNav within maybe 1/2 mile, but on an Ammunition Ship, not a Destroyer.

Here in the New World if you are a member at Staples (office products store) you can recycle electronics and get $5 in points to spend whenever.

I changed to “Solar” calculator year ago (if I can see the keys there’s enough light to power them.

I have a "couple" of vernier calipers: They are amongst my "Seldom Used Tools" that can be seen in these two posts on HSM Forum: https://bbs.homeshopmachinist.net/forum/general/2098986-unused-tooling?p=2099887#post2099887...

Quinn (and some others) frequently do as @Steamchick bluing the part before lightly scribing; but then they also only use calipers for approximate measurements, changing to a micrometer for the final dimension. I like the concept of using a calibrated device to scribe a line to work up to, but...

My 10” Westward (post #6) was US$12 from Grainger (free local pickup).

Cargo ships, like the Dali that struck the Key Bridge, typically have one screw: don’t need quick response or high speeds, just go in straight lines. The Dali displaces 149,000 t, is 984’ long and has 55,630 Hp. In comparison, the USS George H. W. Bush (CVN77) displaces 114,000 t, is 1,040’ long...

When I was starting on my MBA I checked about skipping the math courses: they asked if I used Calculus in my day-to-day work and weren’t amused when I told them, “Nobody uses Calculus in their work.” Other than a waste of time and money (was reimbursed), the Statistics & Matrix Math courses were...

Large ships use multiple shafts to get the necessary Hp into the water, also for redundancy. Smaller and auxiliary ships typically have one. Yes, with multiple shafts you can “steer” a ship without using the rudder, but it is not practical for anything other than limping around.