this post was submitted on 16 Jul 2024
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I recently saw a comment chain about nuclear bombs, and that led me to thinking about this. Say there is a nuclear explosion in the downtown of my US city. I survive relatively fine, but obviously the main part of the city has been destroyed, while major zones extending from the center were also badly damaged. What would be a good response to (a) survive and (b) help out the recovery effort?

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[–] Toes@ani.social 57 points 4 months ago (4 children)

Assuming your home isn't on fire. Seal everything, do not go outside! If possible, stay inside for as long as possible. Fill everything with water your bathtub, every cup, bucket, etc. Monitor the radio for emergency broadcasts for what to do next. AM stations are more likely to work. If you have a CB radio handy, (depending on your country) you can talk to authorities on Channel 9.

[–] neidu2@feddit.nl 22 points 4 months ago* (last edited 4 months ago) (1 children)

Tip regarding radio: 2182kHz SSB near the coast. That frequency is monitored by authorities globally. It's the MF equivalent of maritime VHF ch16.

Technically, the same goes for 2187.5kHz, but that's for digital transmission only, and unless you have the required hardware to encode/decode it, you won't be able to make sense of it.

Source: I have a GOC

[–] RattlerSix@lemmy.world 5 points 4 months ago

CB radio has really short range and there's little likelihood that authorities would be monitoring it.

2182 kHz is long range marine radio and only good if you're on a boat. I don't know that anyone you talk to would care about a person on land while they're handling their own maritime emergencies.

If someone really wants emergency radio I'd suggest ham radio or GMRS.

[–] litchralee@sh.itjust.works 11 points 4 months ago* (last edited 4 months ago)

There is also amateur radio (aka ham radio), which can legally and practically operate at higher output powers if necessary, and on far more frequencies than CB. Although doomsday people often say to just buy a ham radio and use it without a license, I don't advise that, simply because having the radio is only half the challenge.

The other half is the ability to competently operate the radio to effectively communicate and organize aid. And this only comes with practice by talking to others, in the form of regular participation in radio nets and/or emcomm activities. Emergency radio isn't even limited to voice transmissions, with digital modes and even fax modes being an option that can transmit quicker and farther. Having a legit call sign will make it easier for rescuers to identify your transmissions, as well as figuring out if you've been located.

While some people will make ham radio a lifelong hobby, others obtain their license simply for small-talk, or for a SHTF scenario, or as longer-distance walkie-talkies when camping in heavily wooded forests. The possibilities are endless, but it all starts with a first radio and some basic training on radio handling.

Ham radio clubs across the USA and the world are generally very welcoming of new folks, so it's worth looking up your nearby club or dropping in on an in-person club meeting.

[–] Fondots@lemmy.world 5 points 4 months ago* (last edited 4 months ago)

The CB radio thing is going to be very location specific, I work in 911 dispatch, I think the state police around me theoretically monitor channel 9 on the highways, but in practice I wouldn't have a lot of confidence in that, they barely look at info we send them over the computer, CB also has a somewhat limited range, so you're counting on them having an officer somewhat nearby or you being close to their station.

As for local police, around me I suspect a few of them probably still have a CB antenna on the roof of their station and maybe even an old radio stashed somewhere in a closet but not hooked up and not being monitored, and the officers definitely don't have them in their vehicles.

I'm in a pretty dense suburban area outside of a major city, they might still get some use in more rural areas where cell signals aren't as reliable, though you're probably going to run into the same issues with range limitations, in normal ideal conditions, you might get a range of about 20 miles or so, depending on atmospheric conditions, geography, etc. you might get only a fraction of that.

EDIT: FWIW, I keep a CB in my car, decent amount of chatter still happens on 19 around me, and a few other channels, and somehow channel 9 seems to have become essentially the Spanish language channel.

[–] abbadon420@lemm.ee 4 points 4 months ago (2 children)

How long would I have to stay indoors? A week? A month?

[–] theRealBassist@lemmy.world 7 points 4 months ago* (last edited 4 months ago)

As long as possible to an indeterminate time and/or when authorities indicate to leave.

[–] tiredofsametab@kbin.run 3 points 4 months ago

Generally, the worst intensity stuff is actually over in the first 48-72 hours depending upon various factors. That's not to say outside is completely safe after that (it wouldn't be), but the level of danger is very different.