gravely wounded. Eberhardt requested air support, but it was delayed due to bad weather over Westerplatte. On that first day's combat, the Polish side had sustained four killed and several wounded. The German marines had lost sixteen killed and a hundred and twenty wounded. The German commanders concluded that a ground attack was not feasible until the Polish defences had been softened up. Re-examining aerial photographs, where they had previously underestimated the Polish defences, they now overestimated them, concluding the Poles had constructed extensive underground and armoured fortifications (six haystacks were declared to be armoured bunker domes). In the following days, the Germans bombarded the Westerplatte peninsula with naval and heavy field artillery, including a 105 mm howitzer battery and 210 mm howitzers. On 2 September, from 18:05 to 18:25, a two-wave air raid by 60 Junkers Ju 87 Stuka dive bombers dropped of bombs, eliminating the Polish mortars, destroying Guardhouse V with a bomb and killing at least eight Polish soldiers. The air raid shrouded all of Westerplatte in clouds of smoke and destroyed the Poles' only radio and much of their food supply. According to some German sources, after the air raid the Poles briefly displayed a white flag; but not all historians are convinced of this, and the German observers may have been mistaken. On 4 September, a German torpedo boat, T196, supported by an old minesweeper, the Von der Gronen (formerly ), made a surprise attack. The Poles' Wał outpost had been abandoned. Now only the Fort outpost prevented an attack from the north. Though the Poles never landed a hit on the German naval units, T196 and Schleswig-Holstein suffered accidents due to crew error or equipment failure, with at least one fatality and several injured men on the battleship. On 5 September, Sucharski held a conference with his officers, during which he urged surrender: the post had only been supposed to hold out for twelve hours. His deputy, Dąbrowski, opposed surrender and the group decided to hold out a while longer. Subsequently, the Poles repelled several cautious German probing attacks. At 03:00 on 6 September, during one of the attacks, the Germans sent a burning train toward the Polish positions, but the ploy failed when the terrified driver decoupled prematurely. The train failed to reach its target, an oil cistern; instead, it set fire to the woods, which had provided the Poles with valuable cover.