segeln
to sail
To move on water in a sailboat or sailing ship using wind power.
Im Sommer fahren wir oft an den See, um zu segeln.
In summer, we often go to the lake to sail.

to sail
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to sail
To move on water in a sailboat or sailing ship using wind power.
Im Sommer fahren wir oft an den See, um zu segeln.
In summer, we often go to the lake to sail.

Since 'segeln' (to sail) describes movement, the perfect tense is always formed with the auxiliary verb 'sein' (to be), not with 'haben' (to have). This is a common mistake.
Wir sind letztes Jahr über den Atlantik gesegelt.
We sailed across the Atlantic last year.
The verb 'segeln' (to sail) is derived directly from the noun 'das Segel' (sail). A sail is the large piece of cloth on a ship that catches the wind.
Der Wind blies kräftig in die Segel.
The wind blew strongly into the sails.
When sailing on water, the prepositions 'auf' with dative (where?) or 'über' with accusative (to where? across which surface?) are often used.
Am Wochenende segeln wir auf dem Bodensee.
At the weekend, we're sailing on Lake Constance.
In the figurative meaning of gliding, the subject is usually something light that moves elegantly through the air. Typical subjects are 'ein Vogel' (a bird), 'ein Blatt' (a leaf), or 'eine Feder' (a feather).
Ein einzelnes Herbstblatt segelte langsam vom Baum.
A single autumn leaf glided slowly down from the tree.
to drive / ride
'fahren' and 'segeln' both describe moving from place to place. But 'fahren' is much more general: you can 'fahren' by car, bus, train, or bicycle, and you can also 'fahren' to a place. 'segeln' only fits when you move on water in a sailboat or sailing ship using wind power. Learners may confuse the words because a sailboat is also a means of transport. More natural is: you use 'fahren' with a car, and 'segeln' with a sailboat.

Im Sommer segeln wir mit Freunden über den See.
In summer, we sail across the lake with friends.
Nach der Arbeit fahren wir mit dem Zug nach Hamburg.
After work, we take the train to Hamburg.