[tedunangst]

Not so easy to get just the tip of the iceberg to stand out.

[o11c]

Try drawing a "^" shape. The fundamental constraint is that the iceberg hates going too deep; with the two legs, any rotation would force that and is thus forbidden.

A flat bottom can almost work but is highly prone to accidental asymmetry.

[navane]

A very flat triangle with convex flanks does the job

[ant6n]

Draw a fat boat with a very thin long mast.