Genoa, English shipping and navigation expertise

How did Genoa's navy and maritime expertise affect English shipping?

In this account, Genoese protection offered a cheaper route than building a fleet to contest it, while navigation teaching spread expertise.

In this account, paying Genoa to use its flag and protect English ships cost less than sending a fleet to confront its Mediterranean power. Genoese sailors coming to England strengthened navigation schools by bringing the skills and reputation of Mediterranean navigators and cartographers. A school run jointly with a Genoese sailor could draw on expertise beyond local North Sea experience. Organized teaching and apprenticeships helped English navigation and cartography develop together.