to head for / to control
Loading your saved state.
to head for
To move deliberately toward a specific destination, especially with a vehicle, ship, or airplane.
Nach dem Sturm entschied der Kapitän, den nächsten sicheren Hafen anzusteuern.
After the storm, the captain decided to head for the nearest safe harbor.
'Ansteuern' (to head for/to control) is a separable verb. The prefix 'an-' goes at the end in a main clause. In subordinate clauses and in the infinitive with 'zu', the verb stays together.
Das Schiff steuert den Hafen von Hamburg an.
The ship is heading for the port of Hamburg.
The destination that one 'ansteuert' (heads for/controls) is always a direct object in the accusative. You do not need a preposition like 'zu' (to) or 'nach' (to).
Der Pilot steuert die Landebahn an.
The pilot is heading for the runway.
The context makes the meaning clear. If it is about vehicles and geographical destinations, such as harbors, cities, or coasts, literal movement is meant. If it is about technology, such as drivers, memory, or devices, activation within a system is meant.
Wir steuern als Nächstes die kleine Insel im Süden an.
Next, we are heading for the small island in the south.
The meaning 'etwas aktivieren' (to activate something) is typical of technical and computer science language. It is rarely used in normal everyday speech.
Das Programm muss die richtige Speicheradresse ansteuern.
The program has to control the correct memory address.
to address / appeal to
'ansprechen' and 'ansteuern' both have to do with a target. With 'ansprechen', the target is a person you want to start a conversation with. With 'ansteuern', you move deliberately toward a place or destination, often with a vehicle. The words can be confused because in both cases you are going toward something or someone. But 'ansprechen' is linguistic and social, while 'ansteuern' is spatial and describes movement toward a destination.
Nach dem Regen steuert das Boot langsam den Hafen an.
After the rain, the boat slowly heads for the harbor.
Herr Kaya spricht im Zug eine Kollegin an, weil er eine Frage zur Präsentation hat.
On the train, Mr. Kaya approaches a colleague because he has a question about the presentation.