The article examines the sinking of the Andra, a German-origin steamship that played a significant role in supporting the Republican cause during the Spanish Civil War. The Andra, which was originally named Indra and was launched in Hamburg in 1922, operated under a Panamanian flag and was instrumental in transporting tanks and ammunition to the Republican forces in ports such as Bilbao and Santander. Its involvement underscores the complex international affiliations during the war, particularly the contrasting roles of Nazi Germany, which provided support to the Francoist rebels.

On April 5, 1937, shortly before the infamous bombing of Gernika by the Condor Legion, the Andra was sunk by Francoist naval vessels while attempting to seek refuge in the Abra of Biscay. This event marked a significant moment in the war, emphasizing the dangers faced by vessels allied with the Republican side as they navigated contentious waters dominated by Francoist forces. The sinking reflects the perilous environment surrounding the maritime operations of the time, complicated by foreign interventions.

The wreck of the Andra now lies at a depth of 70 meters near Islares and Cerdigo, not far from Castro Urdiales, and is accessible to divers. The remains of the vessel serve as a historical artifact and a reminder of the naval confrontations that were integral to the struggle between the Republicans and Franco’s forces during the Civil War, highlighting the often-overlooked maritime aspect of the conflict that played a critical role in the unfolding events of 1937.