The Portuguese pilots had been well trained in Mediterranean methods of dead-reckoning and it seems likely that they were familiar with the northern methods of sounding the sea bed.
Abaqhubi benqwelomoya bamaPhuthukezi baqeqeshwa ngokwaneleyo ngendlela zase Mediterrenean zamatye afileyo kwaye ibonakala ingathi zazifana nendlela zasemntla lokuvakala njenge bhedi yolwandle.