The symbol for a radio mast on an ordinance survey map is typically a triangle with a line through the top, representing the mast structure. It is often accompanied by a small circle to indicate the location of the mast.
I wonder, which map the question originator is looking at? On Ordnance Survey maps symbol guides, there is no RED STAR. There is however a blue star meaning: Other Tourist Feature.
it is a line
Ti
= congruent sign
a positive sign in an atom symbol denotes an ion, for example, Fe2+
The symbol for "if and only if" is ↔ or ≡. This symbol denotes a biconditional relationship where the statement on the left implies the statement on the right and vice versa.
prop denotes property tiger is symbol of power.
It is a nature reserve.
A snowflake symbol on a Saab denotes the air conditioner.
it means the compound is dissolved in water.
The words "DANGER MINES" in bold letters, will warn of a mined area.