Always run apt update before clicking on synaptic ?

[Roger Price]

man synaptic says « It allows you to perform all actions of the command line 
tool apt-get in a graphical environemnt. »

In the help manual I read « Reload the package information to be aware of the 
latest versions available: »

Does this mean that synaptic does _not_ call apt update, and that I should 
always run apt update manually before clicking on synaptic?

Some experiments suggest that this is the case.

Roger