Substantial threat of such a discharge
Substantial threat of such a discharge means any incident involving a vessel that may create a significant risk of discharge of cargo oil. Such incidents include, but are not limited to, groundings, strandings, collisions, hull damage, fire, explosion, loss of propulsion, flooding, on-deck spills, or other similar occurrences.
Source
33 CFR § 155.1020
Scoping language
Except as otherwise defined in this section, the definitions in 155.110 apply to this subpart and subparts F and G of this part. For the purposes of this subpart only, the term: