I made a couple dives off Oahu's North Shore on Sunday;
The Helms Wall shore dive has a long surface swim at the start just to get beyond the large fringing reef (.4 miles on Google Earth). I continue surface swimming to make my descent at an incredible turtle cleaning pinnacle (.12 miles more). From this location I can make it all the way out to the end of the canyon wall (.28 miles, 50' ave. depth) and back (30' ave. depth) to the cleaning station (100 cft), as long as there are no special photography detours. Sunday there were unfortunately no special detours.
Looking at the tide calendar, using the Haleiwa correction, I started just after slack going from low to high. Mokule'ia is evidently not the same correction as Haleiwa, as the outgoing current helped me into the just starting 10:30 AM breeze (not quite slack - perfect). ~25 minutes of otter swimming, checking out the mountainside trying to remember my channel lineups from 4+ years ago. Only a couple gentle tank hits on the shallow reef, just like ridin' a bike.
~10 more minutes to the cleaning station. The spearfisher who's flag I'd been watching for the last hour and a half before splashing has also finally meandered to the same area of the wall. I float over him taking pictures as he peers over the edge; I don't think he ever saw me.

Dropping down, with a complete circumnavigation of the cleaning pinnacle, there are already a dozen turtles in sight. Heading out and down my strobe quits working at ~60'. I max out at 73' before noticing and climb back above 60' where it comes back on. Now relegated to above 65' I try not to be bummed. Lot's more turtles and many spooked fish what with the hunter bouncing his spear off the reef every now and then. Only cool predator on the way out is a viper moray, in a hard crack for photo's.

I push it a little below 1500 psi to the 55' deep pinnacle top of the rock just past the end of the canyon; sand depth 85-90'. Google Earth puts this spot ~.75 miles off the beach, but .82 miles as swum.
Heading back I stay at least 45' deep to get the full effect of the skinny side canyon I like to return through. The end of that crack forces you up to 25' to get over the reef top and back on the main wall. Can't go much lower than 40' at this point if I want to surface at my descent point (and the spearfisher's float).
Just have to take a couple more pics of the turtle cue, although this looks more like a melee. Now a swimming SS with my puck clearing just as breathing really slowed. I won't tell the ending pressure, but I dried my first stage cap and made air noise at the dive shop
That's jumping ahead by a little. I still have ~40 minutes of surface swimming after my 66 minute dive. The wind swell has kicked up pretty significantly as the wave faces were easy over 4' even though the ground swell is only listed at flat-1'. It's still pretty slack; I was expecting more push from the wind, waves and tide. The last quarter mile I mostly frog kick as the Gara 2000's are starting to break skin, and I do 6-8 mild current dives per week in these fins.
Finally, I'm ashore, 2 hours and 15 minutes after entry.
After lunch I head to Shark's Cove with an 80 cft. Talk about a change of pace; from deserted Mokule'ia to traffic jam Pupukea. Timing is everything and I luck out with a parking spot close to the showers. Two lds van loads are nearly ready; I'm too late to tag behind looking like I'm part of a group with a flag. No worries, the lifeguard does not seem to care.
Where I sit in 2' deep water to don fins there is a tourist snorkeler with no fins turning over boulders. I yank him up by his foot to ask him what he's doing. Looking for shells is his answer. I threaten to get out and call DLNR right now because this is a Marine Life Conservation District. Not only is it no take, it is also no disturb the geography! He tells me he will quit, I go diving.

I head to the far North point, not many tourist divers ever get there. I cruise through the main cavern features and when I'm most of the way across the last cove I find a small white tip reef shark under a big boulder. It's got a hook in it's mouth, but at least they threw it back! This area has been protected since '02 and this is the first time I've seen a shark at Shark's Cove!

Out at what some local instructor once called Wolf Cave, I'm struck by the lack of crustaceans. I search caverns for lobster, crab and shrimp to show guests off Lanai 2-4 days a week. Here alone I can spend even more time poking my nose into cracks and crevices; a couple banded coral shrimp and a small crab are all I can spot. Sure there are more hiding places here, but it feels like the neighbors to the North must be hunting and collecting, even though it's protected
On both dives I'm looking for different photo angles than I have from years ago, but my keepers are very few. I follow the inside edge of the cove and there is
not more fish than I remember, which surprises me due it's protection for over 7 years now. I enjoy all the lava tubes, but it would be pretty depressing to guide here on a daily basis, even though that's a possible future for me.
85 minutes of wandering and not getting that many good shots, but at least I got wet
