Hi bulka,

The short answer to your question is "it depends".

It depends on which direction you want to go through the heads, the prevailing current, winds, swell and sea conditions.
There are many considerations to be taken into account in traversing the heads safely.
For example, traversing (exiting or entering) the heads on an ebb tide with a prevailing southerly wind is generally very inadvisable.
In general, whenever the current is against the wind the conditions can be dangerous.
Peak currents, coinciding with high and low tides, can be up to 8 Knots. Do you have enough engine power to make reliable headway against these levels of current?

Traversing the heads at times other than slack water requires a good understanding of the dynamics and risks involved - it is certainly very inadvisable without significant previous experience of slack water traverses.


Traversing the heads at any time is not to be taken lightly - make sure you fully understand what to expect and the risks involved.

pm me for a very useful document "RBYC Getting through the Rip"

regards,
Allan

I agree with Datawiz. Asking the question implies you haven't been through the heads before, so I suggest you be conservative and go through at slack water.

After many ins/outs, I am a bit more confident and flexible, but no matter how "clever" and experienced one becomes, wind against tide (especially during the ebb) at the heads is always something to be wary of.

And just to complicate things, it also depends on whether you're going in/out on the east side around Pt Nepean, or to the west off Pt Lonsdale. Hence the advice - if you have to ask, slack water is your only sensible option.

Google ORCV and check out their "Rip Tours". They take you through on a sizable motor launch with an experienced commentator and you a laminated chart showing all you need to know. Very highly recommended, and fun besides.

It's a bit like crossing a busy road - do it at the right time and you wonder what on erth all the fuss is about. Do it at the worng time and....splammmo - you're on the 7pm news!

Also treat yourself to a copy of "Cruising Vicoria" published by the Cruising Yacht Asociation of Victoria for a excellent coverage (Boat Books have it, or buy direct from CYAV). This book is a must-have for any Victorian/Bass Strait cruisers.

Cheers, Graeme

I think when its high tide at St Kilda its slack water at the heads Am I correct in saying that Data Wiz?

I have found the time of slack water to vary quite considerably from the published times, since it is influenced strongly by wind and barometric pressure which can't be predicted at the time the data is published. But if you're going through within about 20 minutes either side you should be ok.

The little Port of Melbourne Tide Tables book, by the way, is a great source of info especially with regard to predicted tidal current velocities at the heads.

Cheers, Graeme

Anyone mentioned old Nav. rules " 4 finger to West "
My last trip was on T/ S going from St Kilda to Westernport going through Heads at 4 am in winter.
Just follow western channel markers keep heading South until Queenclif had enoug and allow me to cross channel.
Needles to say , it was heavy traffic and thick fog. expirience priceless

Datawiz said..

HG02 said..
I think when its high tide at St Kilda its slack water at the heads Am I correct in saying that Data Wiz?

I 'think' that's right HG, but I'd prefer to go with the BOM advice at this link..

www.bom.gov.au/australia/tides/#!/vic-the-rip

regards,
allan

I used every thing I could find, when I went through Allan

suggest that you look up tidal streams on bom
not high/low water
lots of info out there
orcv has good info

I have just booked for the ORCV Rip Tour on 16th Oct. An expensive little jaunt for an hour or so, but I'm sure I will learn a lot in that time.

Oops, I meant "across to Point Nepean"

Pt lonsdale

Thanks all. Managed to time Slack Water, so all good. Was just wondering.

If conditions are right, you can stay East or West of the shipping channel. With GPS is easy to follow the edge of the channel
and from my expirience sea state on both sides are identical. I used to cross channel going overnight to Port Arlington,
but many yachts and boats simply avoiding to cross shipping channel twice.

In last 35 years more boats been lost entering or leaving Westernport than PPB.
Many years ago leaving Westerport on 47" yacht " Yantara" we expirience 8 m waves,
miles before Cape Shank. Passing Cape Shank, Bass Strait had no waves just mild swell.
Actually waves on pic. are not rare in Port Phillip , entering Mordialoc creek,
gusting 35+ you see many of those.

Charriot said..
In last 35 years more boats been lost entering or leaving Westernport than PPB.
Many years ago leaving Westerport on 47" yacht " Yantara" we expirience 8 m waves,
miles before Cape Shank. Passing Cape Shank, Bass Strait had no waves just mild swell.
Actually waves on pic. are not rare in Port Phillip , entering Mordialoc creek,
gusting 35+ you see many of those.

There's a couple of spots where the waves don't build as much in western port its sightly deeper in a couple of spots. But just the same they roll in

spiggie said..
Just went through the heads 30kts Nw, fairly straightforward going through after 13 day trip from Hammo to Melbourne .sorry photos upside down