Ushuaia Boating appears on the municipality's official list of Isla Martillo penguin-colony providers, and runs Beagle Channel navigations out to the lighthouse, the sea-lion and cormorant islands and the penguins.
The WhatsApp number on their site matches the one the municipality publishes for them. They give no office address; the pin marks the Muelle Turístico, where the channel boats leave. Book by WhatsApp.