Disaster relief, anti-slavery patrols, and naval self-interest

What naval missions have the strongest claim to being morally beneficial?

Disaster relief is the clearest case, while anti-slavery patrols also rank highly but combined humanitarian results with British economic and strategic interests.

Disaster relief is identified as an especially strong candidate for the most morally good naval mission. A later suggestion places naval anti-slavery patrols high on the list as well. Those patrols also damaged competing economic systems and served British interests. Beneficial outcomes did not require pure motives, so the anti-slavery campaign is treated as enlightened self-interest rather than uncomplicated altruism.