DHeckrotte
Guru
Past discussions on this Forum have considered manometers for indicating fuel contents in tanks. No doubt reliable, simple, and effective, this is why we shouldn’t be tempted:
https://maritime-executive.com/article/faulty-fuel-system-contributed-to-deadly-passenger-boat-fire
https://maritime-executive.com/article/faulty-fuel-system-contributed-to-deadly-passenger-boat-fire