Admiral Samed from the Shah’s-era military:

Iraq claimed that the Arvand River belongs to us; any vessel that wants to pass through this Arvand River must both fly the Iraqi flag and pay fees.

Iran said that such a thing isn’t the case. At that time, an order was issued that the ship Ibn Sina would enter the Arvand River from the Khawr Abdullah, with the flag flying above the mast, the flag of the Lion and Sun of Iran on top of the mast, and the commander of the Navy would also stand by the mast.

The Commander-in-Chief—Mohammad Reza Shah Pahlavi—ordered that this ship move from here. If any bullet is fired at this ship, the order for naval combat would be issued.

Without any problem, and without any birds flying around it, the ship set off and went, arriving and taking position at the Khorramshahr port. Iraq didn’t even dare to breathe.