Table 6.

Tsunami information to help mariners’ protective action decision-making

Type of information	Details
Tsunami specifics	•The estimated time of arrival of the first wave or surge. •The anticipated severity, intensity, or magnitude of it.
Impacts	•The location of expected impact(s). •The expected impacts to boats, marina infrastructure, and people in the marina.
Advice	•Clear advice to stay off of boats and out of harbors. •How far/deep to go if evacuating by boat. •Where and how to evacuate on land. •How long to expect and prepare to be out of the harbor.