International frequencies

[K6GBW]

Ships and casinos should move to WiFi radio networks. Frees up the spectrum and they don't have to worry about licenses. Most of the ships already have pretty good WiFi anyway so it would be easy. I know some casinos have done this already, not sure why it's not more popular.

 

[ecps92]

Ships and casinos should move to WiFi radio networks. Frees up the spectrum and they don't have to worry about licenses. Most of the ships already have pretty good WiFi anyway so it would be easy. I know some casinos have done this already, not sure why it's not more popular.

Many Cargo/Container ships have Pith-Poor wifi if any

Also from a Cruise Ship, wifi doesn't generally cover much away from the ship onto the Dock areas.
and for a critical function, I would not trust my life on wifi, give me a two-way radio for Life-Safety

 

[mmckenna]

not sure why it's not more popular.

I've had to have this discussion at work.

For non critical operations, WiFi/DECT/etc. is fine.
For anything critical, your average IT guy running the network that supports WiFi couldn't tell you the difference between UHF, VHF, VHS or VH1. To an IT guy, robust power is that they get a network device with redundant power supplies, and then plug them into the same power strip. To an average IT guy, they assume that they are experts on any and all technology, and won't ask for help and try to 'wing it'.

Usually shipboard operations are a bit more critical than that.
On a cruise ship, sure, housekeeping staff can absolutely use the network, and usually are running on DECT phones.
The UHF frequencies for shipboard use are mostly intended for intraship communications or ship to dock, in other words, talking within the immediate area of the ship where VHF may not propagate well enough.

But, I agree, radio over WiFi, LTE or similar services often get overlooked.

 

[paulears]

No idea where those extra digits sprung from - it was a copy and paste and I didn't notice!

 

[AM909]

No idea where those extra digits sprung from - it was a copy and paste and I didn't notice!

Page 6 at https://www.lsac.co.uk/downloads/ship-terms.pdf:

 

[mmckenna]

It's also listed here with 25KHz, 12.5KHz and 6.25KHz channel spacing:

https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1174-4-201910-I!!PDF-E.pdf

 

[paulears]

Never spotted the footnotes - another reason to never use phones!

 

[speedway_navigator]

From the pdf - The audio-frequency band should be limited to 2 550 Hz.

I always saw 3 kHz as max in the US, wonder why they knocked off 450 Hz.