Wanna know how to meet up with your friends? Run north or south until you reach the border of either the desert or snow biome, whichever you think is closer. Make sure everyone runs the same way, obviously; two guys on the sand and one guy in snow won’t meet each other too quickly.
Once you hit the border between the biomes, look around the map for a common landmark, such as a mountain. You are now able to make imaginary lines to work out where you all are across the map according to that reference point, because the biomes are roughly paralle with latitude. If that turns out not to be very easy, everyone starts heading either east or west (decide as a group) until they find a landmark they can all see, or you hit the beach. If you hit the beach, just wait; unless they get killed, they’ll get there soon enough.
That’s a near-foolproof way of navigating, and there are more sophisticated techniques available with a little thought.
Sure, a teleport would be more convenient than this, but teleports don’t belong in vanilla Rust. Go nuts with plugins, but not vanilla.