Why is this allowing 50 plus touched events to fire?

I am trying to prevent touch from firing more then once, i have tried debouncing adding to tables and nothing is working to stop it.

function fireTorpedo(v)
	this.MainPart.FirePhoton:Play()
	local t = Instance.new("Part",workspace)
	t.CanCollide = true
	t.Anchored = false
	t.Size = Vector3.new(0.2,0.2,0.4)
	t.BrickColor = BrickColor.new("Really red")
	t.Material = "Neon"
	local m = Instance.new("SpecialMesh",t)
	m.MeshType = "Sphere"
	local l = Instance.new("PointLight",t)
	l.Color = Color3.new(1,0,0)
	
	local bv = Instance.new("BodyVelocity",t)
	
	local pos = (this.Model.TorpedoTube.CFrame*CFrame.new(3*torp_tube,0,-4)).p
	local dir = (v) and (v - pos).unit or this.Model.TorpedoTube.CFrame.lookVector
	
	t.BodyVelocity.velocity = this.MainPart.Velocity + dir*200
	t.CFrame = CFrame.new(pos,pos + dir)
	
	torp_tube = -torp_tube
	
	t.Touched:connect(function(hit)
		local p3 = Instance.new("Part")
		p3.Transparency = 1
		p3.Anchored = true
		p3.CanCollide = false
		p3.Size = Vector3.new(0.2,0.2,0.2)
		p3.Parent = game.Workspace
		p3.Position = t.Position
		game:GetService("Debris"):AddItem(t)
		game:GetService("Debris"):AddItem(p3, 0.75)
		local ex = Instance.new("Explosion")
		ex.BlastPressure = TorpedoBP
		ex.BlastRadius = TorpedoBR
		ex.DestroyJointRadiusPercent = 0
		ex.Position = p3.Position
		ex.Parent = workspace
		local modelsHit = {}
		local HarmFireFX = this.MainPart.HarmFireFX:clone()
			  HarmFireFX.Parent = p3
			  HarmFireFX.Enabled = true
		local HarmShotLight = this.MainPart.HarmShotLight:clone()
			  HarmShotLight.Parent = p3
			  HarmShotLight.Enabled = true	
			
			ex.Hit:Connect(function(part, distance)
		local parentModel = part.Parent
		if parentModel then 
			if modelsHit[parentModel] then
				return
			end
			modelsHit[parentModel] = true
			local humanoid = parentModel:FindFirstChild("Humanoid")
			if humanoid then
				local distanceFactor = distance / ex.BlastRadius 
				distanceFactor = 1 - distanceFactor 
				humanoid:TakeDamage(TorpedoDamagePlayer *  distanceFactor)
			end
		end
			end)
		local debounce = false
		t.Touched:Connect(function(hit)
			local modelsHitTorp = {}
			local parentModel = hit.Parent
			if parentModel then 
			if modelsHitTorp[parentModel] then
				return
			end
			modelsHitTorp[parentModel] = true
				local VehicleHealth = parentModel:FindFirstChild("VehicleHealth") 
				local GateshipShield = parentModel:FindFirstChild("GateshipShield")
				while debounce == false do
					debounce = true
					print ("True Debouncing")
					if VehicleHealth and not GateshipShield then
					print ("Hull Hit Torpedo")
					hit.Parent.VehicleHealth.Value = hit.Parent.VehicleHealth.Value - TorpedoDamageShuttle
					end
					wait(1)
					debounce = false
					print ("False Debouncing")
				end
			end
		end)
			local modelsHitTorp = {}
			local parentModel = hit.Parent
			if parentModel then 
			if modelsHitTorp[parentModel] then
				return
			end
				local GateshipShield = parentModel:FindFirstChild("GateshipShield")
				local ShieldHealth = parentModel:FindFirstChild("ShieldHealth")
				if ShieldHealth and GateshipShield then
					print ("Shield Hit Torpedo")
					hit.Parent.ShieldHealth.Value = hit.Parent.ShieldHealth.Value - TorpedoDamageShuttle
				end
				end
		end)
	end

Maybe try adding a variable that is equal to the amounts of times you want the function to be fired. For instance

local counter = 5

local function hit()
	if counter > 0 then
		--example code
		print(counter)
		counter = counter - 1
	end
end
while true do
	wait(0.5)
	hit()	
end

When counter reaches 1 it stops. But maybe put the local counter = 5 variable outside of a while true loop or something. So that counter doesn't become 5 each time. If you don't have while true loops. And from reading your script you don't. Then this shouldn't be a problem. Just put the variable at the top of the script.