Why don't you try again Tim, as both Gibraltar and Granada were in Muslim Hands in 1307. To sail a vessel in 1307 through the straits of Gibraltar, you would have to pass between two Moorish areas.
Why don't you try doing a little reading on the Reconquista, Bill? You're clearly in over your head (again)...
Please publish the part about Granada being under Muslim control until the 15th century
Here - courtesy of Wikipedia (no use bringing out the good stuff)...http://en.wikipedia.org/wiki/Kingdom_of_GranadaEmirate of GranadaTributary State
With the Reconquista in full swing after the conquest of Córdoba in June 1236, Mohammed I ibn Nasr aligned Granada with Ferdinand III of Castile in 1238, thereby creating a tributary state, or taifa, under the Crown of Castile. Granada remained a tributary state for the next 250 years
, with Nasrid emirs paying tribute to Castilian kings mostly in the form of gold from present-day Mali and Burkina Faso that was carried to Iberia through the merchant routes in the Sahara. The Nasrids also provided military assistance to Castile for its conquest of areas under Muslim control, most notably Seville in November 1248 and the Taifa of Niebla in 1262.
In 1305, Granada conquered Ceuta, but lost control of the city in 1309 to the Kingdom of Fez with the assistance of the Crown of Aragon
. Granada re-captured Ceuta a year later, but again lost it in 1314. Granada again held the city from 1315 to 1327. In 1384, Granada again re-took Ceuta but lost it definitively in 1387.
Granada's peace with Castile broke down on various occasions. Granada lost territory to Castile at the Battle of Teba in 1330. In 1340, Granada under Yusuf I supported the failed Marinid invasion of the Iberian Peninsula, which ended at the Battle of Río Salado.Regional Entrepôt
Granada's status as a tributary state
and its favorable geographic location, with the Sierra Nevada mountains as a natural barrier, helped to prolong Nasrid rule and allowed the Emirate to prosper as a regional entrepôt with the Maghreb and the rest of Africa
. In fact, Granada was a prosperous city during the Crisis of the Late Middle Ages when much of Europe stagnated. Granada also served as a refuge for Muslims fleeing during the Reconquista. Regardless of its comparative prosperity, intra-political strife was constant, skirmishes along the border occurred frequently and territory was gradually lost to Castile.
Granada was tightly integrated in Mediterranean trade networks and heavily financed by Genoese bankers aiming to gain control of the gold trade carried in through Saharan caravan routes. However, after Portugal opened direct trade routes to Africa by sea in the 15th century, Granada became less important as a regional commercial center. With the union of Castile and Aragon in 1469, these kingdoms set their sights on annexing Granada.
(The Kingdom of Fez is what lay on the African side of the Straights of Gibraltar. An entrepôt is a trading hub, in this case, trading between Europe and North Africa.)