watchOS 5
Use Apple Watch to get directions or contact a friend
Use Find My Friends to quickly get directions to a friend.
Get directions to a friend
Open the Find My Friends app
on your Apple Watch.Tap your friend, scroll down, then tap
to open the Maps app 
.Tap the route to get step-by-step directions from your current location to your friend’s location.
Contact a friend
Open the Find My Friends app
on your Apple Watch.Tap your friend, scroll down, then tap
to call, email, or send a message to your friend.