A powerful image of a destructive storm at sea illustrates the sudden downfall and absolute terror that overtakes those who stand against God. The fiercest of winds [מצודת דוד] is an eastern wind that can quickly develop into a sudden, severe storm [ביאור שטיינזלץ]. This wind serves as a symbol of the disaster through which God punishes the wicked, echoing the very wind that struck Egypt during the splitting of the Red Sea [רש״י].
The sheer force of this storm is directed against exceptionally strong ships built to sail long distances to the far edges of the Mediterranean Sea [ביאור שטיינזלץ]. These vessels are associated with Tarshish, a major gateway for ships [רד״ק], which some identify with the neighbors of Tyre in the regions of Africa and Edom [רש״י].
The primary approach among commentators is that this destruction is metaphorical. The intense fear and trembling that grip the enemies are compared to the helpless panic of seafarers trapped in a fierce east wind that shatters their mighty ships [אבן עזרא, רד״ק, ביאור שטיינזלץ]. Conversely, another perspective views this as a literal description of divine punishment. In this view, God physically shatters the vessels of the enemy armies arriving by sea [מצודת דוד]. Destroying their fleet prevents them from returning to their homeland, proving to them with absolute certainty that this devastating blow was delivered directly by Him [אלשיך].