Can lah, big boats can pass through Punggol, Pasir Ris and
Changi, unless you are referring to those super super big boats,
then really cannot go through. If not how big boats ended up in the
wharves in Sembawang and Senoko? And the port of Pasir Gudang (
Johor port )? Now they are planning the third port in Johor, at the
river mouth of Sungei Johor, North of Tekong and Ubin.
Even if big boats can go through the whole Selat Johor, the traffic
flow will not be huge, Selat Johor is not as wide as Singapore
Straits. Moreover, smaller boats such as fishing boats, sampan,
canoe, tugboat, passenger ferry, navy vessels, Police Coast Guard
and bumboats ( both Singapore and Malaysian ones ) also used Selat
Johor. What about the kelongs? Not the kelong in the soccer
matches, but the floating fish/prawn farms, will be a hazard for
ship navigation. Meanwhile, an area reserved for vessel anchorage
for quarantine will also be needed.