Another disadvantage is the potential difficulty of taking part in the activity and observing simultaneously.

The signal needed to be observed simultaneously from both the L-4 and L-5 locations.

Also having more than one telescope simultaneously observing the same spot can help exclude cosmic rays.

The instrument panel must be designed so that the pilot can look out the window while simultaneously observing important gauges.

Neptunium has valence states from 3 to 7, which can be simultaneously observed in solutions.

Groups of up to 14 starfish have been observed simultaneously feeding on one large limpet.

What celestial sign was by both simultaneously observed?

Pageos could therefore be observed simultaneously e.g. from Europe and America.

When many logic levels need to be observed or recorded simultaneously, a logic analyzer is used.