I often use https://aprs.fi to view packets that have made their way through an iGate, or digipeater of some kind onto the Internet. My vehicle uses the SSID W6KKO-12 via a one-way Byonics RTG tracker with a beacon once per hour when stationary. I also use APRS directly on my radio, or via a tablet connected to my mobile. It is a useful and unique resource available to licensed amateurs whether at home, mobile, or pedestrian mobile. I even have a receive only iGate that monitors 144.390 MHz 24/7. Additionally, the Internet is not a necessity as our license provides for much more when using APRS.
Tip: The International Space Station (ISS) from time to time also supports APRS using an onboard digipeater, but ensure you use 145.825 MHz FM.
While you may be familiar that APRS is often used to send a beacon for tracking, it can also be used to share a particular frequency you are monitoring so that others viewing your packet information can take advantage of voice communication all without the Internet. Beyond position reports and voice contact, licensed amateurs can enjoy the digital messaging and informational responses to specific requests. For example, the weather for day or upcoming week at your location, or another you may be traveling to. What about 2m or 70cm analog or digital repeaters that may be nearby, or even finding a pharmacy? APRS can handle those requests as well. It is prudent to first ensure you send a position packet or two via APRS before taking advantage of messaging or requesting information at least once every 24 hours. The APRS network will then have your position, so you do not need to include them when requesting information. Please note that you can also reduce the accuracy of your position. This is done directly if your radio configuration supports it.
A particular useful function if you do need to share your location is through MPAD and the posmsg option. This will generate an email with your position information to the address you indicate in the body of the message by using only your radio. Basically one would use,
To: MPAD
Msg txt: posmsg address@somedomain.com
The result in the received email will be similar to the image below. Please note that you are unable to send any additional text, but it will provide your location details with detail in several formats and even a map image. There are other options to send messages, or email with text.
Here is a link to an APRS shortcut PDF I created to help myself and anyone else that needs it. Enjoy it on your mobile device, or tablet. Perhaps print it out on both sides of a paper and laminate it. It is definitely not all inclusive as there are things like SMS that one needs to sign up for and other services that are somewhat redundant. Perhaps grab what you want from my list and make your own.
If APRS is new to you, there are resources online that provide details that can answer questions. The amateur radio hobby we share has many facets. If you enjoy traveling and or camping, APRS is definitely something to research further. If your mobile or handheld has a GPS built-in, it may be A.P.R.S. capable. Your radio manual will tell you more.