What are these small cracks in hull?

[zealer]

Was looking at a 2002 Glastron 250 cruiser today as a new potential toy. The port side has cracks like this (see attached photo) running front to back. They extend mostly down to the keel as far as I could tell. Boat stored in a barn, wasn’t the best visibility. Running my hand over it I couldn’t feel much with my nail. Owner could not provide much info.
Thoughts?

 

[MikeSchinlaub]

Likely stress cracks. No way to know the extent of the damage without grinding them out.

 

[jimmbo]

Gelcoat, cracking usually caused Structural Failure of the Glass underneath...
2002 Glastron, that was the year they introduced the Defective VEC method of Construction. Serious Resin Starved areas in those Hulls.
I have one of those POS, and mine had a complete Transom Delamination. Glastron did Eff ALL regarding the supposed "Lifetime Warranty. The Dealership, pulled the Engine, reattached the Transom, and added a few Extra Layers of Glass in several Areas
Don't walk away, RUN!!!

 

[Scott Danforth]

If you're looking at the boat.....keep looking

Consider them red flags and sirens indicating hull issues

 

[ChooChooSnakeMan]

Gelcoat, cracking usually caused Structural Failure of the Glass underneath...
2002 Glastron, that was the year they introduced the Defective VEC method of Construction. Serious Resin Starved areas in those Hulls.
I have one of those POS, and mine had a complete Transom Delamination. Glastron did Eff ALL regarding the supposed "Lifetime Warranty. The Dealership, pulled the Engine, reattached the Transom, and added a few Extra Layers of Glass in several Areas
Don't walk away, RUN!!!

Indeed, it is a 23 year old hull - don't just RUN but RUN FAST!