The Monument is a very easy dive site, with the relatively longer surface swim being the hardest part. Due to its location right in the bay, viz can be a little worse here than the other sites around Kurnell. But it is still a very nice relaxing dive with usually lots to see. Once you enter the water you snorkel out over kelp in a north easterly direction. There is a red navigation marker out in the bay and if you head towards it you are going in the right direction. Once you become sick of snorkelling you can descend as sometimes large rays are seen swimming over the kelp. You will be in about 4m of water, keep following your compass till you come to a drop off. Drop over the wall for the main part of the dive. If viz is poor the top of the wall also makes an interesting dive. Swim along with the wall on your right.
Monument's a great dive to take a torch, as they're overhangs hiding blue devil fish, wobbegongs, Port Jacksons, Giant cuttlefish and even the occasional banded coral shrimp.
This is a good dive to do as a drift dive if you have an outgoing tide, you can drift from the monument around to Sutherland point or the Steps.
When exiting at the Monument make sure you swim up into the channel as there are many sea urchins on the rocks everywhere else.