attleshipAI.cs(65,90): error CS0176: Static member `battleshipSide.Underattack' cannot be accessed with an instance reference, qualify it with a type name instead

I don’t understand why i can’t accesses the script on the game object, using get component of the game object i want to change a bool to true on that game object sop my other ships cannot target the same ship.

some reason I’m getting this:
BattleshipAI.cs(65,90): error CS0176: Static member `battleshipSide.Underattack’ cannot be accessed with an instance reference, qualify it with a type name instead

for line:
Target.GetComponent().Underattack = true;

	Target = null;
			if (GameObject.FindWithTag("EnemyBroadside") != null)
			{
				Target = GameObject.FindWithTag("EnemyBroadside");
			}
			if (Target != null) {
				//setattacking 
				dist = Vector3.Distance (Target.transform.position, this.transform.position);
				if (dist < 500 && Target.GetComponent<battleshipSide>().Underattack != true) {
					Attacking = true;
					Patrolling = false;
					Defending = false;
					DefenceOwned = false;
					Target.GetComponent<battleshipSide>().Underattack = true; //this target can no longer be tergeted by other battleships.
				}
			} else {
				Target = null;
			}	Target = null;
			if (GameObject.FindWithTag("EnemyBroadside") != null)
			{
				Target = GameObject.FindWithTag("EnemyBroadside");
			}
			if (Target != null) {
				//setattacking 
				dist = Vector3.Distance (Target.transform.position, this.transform.position);
				if (dist < 500 && Target.GetComponent<battleshipSide>().Underattack != true) {
					Attacking = true;
					Patrolling = false;
					Defending = false;
					DefenceOwned = false;
					Target.GetComponent<battleshipSide>().Underattack = true; //this target can no longer be tergeted by other battleships.
				}
			} else {
				Target = null;
			}

As your Underattack variable from your battleshipSide is static you can not access it with a reference as you are currently doing. You need to remove static from your Underattack variable and it will be resolved.