"Spans C, D, E and F are 61m wide with a depth of 5.8m below Chart Datum."
Sunderland wingspan is 34.4 m
And isnīt 61 m the span of Tower Bridge also, while open?
Anyway, Hughes Hercules would have problems. Saunders-Roe Princess, too. And Martin Mars probably does not have necessary clearance, either.