The failure of the Allies to capture Krithia or make any progress on the Helles front led Hamilton to form a new plan to secure the Sari Bair Range of hills at the Battle of Sari Bair and capture high ground on in the Battle of Chunuk Bair. Both sides had been reinforced, the original five Allied divisions having been increased to fifteen and first six Ottoman divisions to sixteen. The Allies planned to land two fresh infantry divisions from IX Corps at Suvla, north of Anzac, followed by an advance on Sari Bair from the north-west. At Anzac, an offensive would be made against the Sari Bair range by advancing through rough and thinly defended terrain, north of the Anzac perimeter. This would be achieved by an attack on from the Nek by dismounted Australian light horsemen from the 3rd Light Horse Brigade, in concert with an attack on Chunuk Bair summit by New Zealanders from the New Zealand Infantry Brigade, who would traverse Rhododendron Ridge, the Apex and the Farm. would be attacked by Gurkhas of the 29th Indian Brigade and the Australians of the 4th Infantry Brigade. The Allies had , mainly from 3 Wing RNAS at Imbros, which had replaced its Voisins with Farmans and Nieuport Xs; "Escadrille" MF98T had also been established at Tenedos. The Ottomans had , of which eight were stationed at Çanakkale. Allied aircraft made reconnaissance flights, spotted for naval guns and conducted low-level bombing of Ottoman reserves as they were brought up to the battlefield. Allied aircraft also undertook anti-shipping operations in the Gulf of Saros, where a seaplane from HMS "Ben-my-Chree" sank an Ottoman tug with an air-launched torpedo.