On October 21, 2001, as a result of declining patronage following the September 11 attacks, the Seacabs closed down and were walled off. The queue of the Seacab ride was left intact and the Seacabs were still visible to guests through the ocean tank windows. Reasons for their closure are not entirely known. After they closed, guests leaving the Hydrolators walked along the former wheelchair bypass corridor to Sea Base Alpha. Now, guests had the option of viewing the preshow or going directly to the Hydrolators and simply walking to Sea Base Alpha.