Grove Creek granted permission to use laser pointers for our Telescopes

There has been a recent complaint from a neighbour, possibly thinking we are breaking the law, when this neighbour saw us use a laser at Grove Creek. This document has been prepared to dispel some myths in regard to the use of these instruments. For accurate star alignment of the telescopes at Grove Creek, we briefly use lasers no greater than 10mW as fixed-mounted viewfinders to synchronise the telescope's optical path with the telescope's computer drive mount, so green laser beams may be seen briefly from time to time, coming from the observatory. These lasers are fixed and are not "hand held" and therefore do not fall under the new legislation - the new laws only apply to "hand held" lasers.

The NSW Police Force understands that people use hand-held laser pointers for legitimate purposes. Recently, we received official permission to use lasers at the Grove Creek Observatory. This is a direct quote from Snr. Cont. Graham, from Trunkey Police (our local station):

"It is my opinion from what information I have been able to obtain that the item (laser) is able to be used by those persons with a 'lawful excuse' (and) 'scientific purposes' is a lawful excuse under the legislation. I have made a record of our conversation on the COPS computer database, your reference number is - E 33676648. If at some point other police make enquiries with you I have stated in the COPS event that you are continuing to use the pointer and from what I have ascertained it is lawful for you to do so."

Click here for the NSW Government FACT SHEET about the use of hand held lasers

In short, the Australian Government has now made it an offence to have a hand held laser pointer in a person's custody in a public place or to use a hand held laser pointer in a public place without a reasonable excuse. If police have reasonable grounds for suspecting a person is in possession of a hand held laser pointer in a public place, that person can be searched, the hand held laser confiscated and legal action taken. This can result in 2 years imprisonment or a fine of up to $5,500.

The reason for these new laws, is due to the stupidity of a very small minority of idiots using green hand held lasers to distract pilots who require visual night clues for landing of aircraft. However, contrary to some exaggerated media reports, previous commercially available green hand-held lasers can not possibly "damage" aircraft and can not be aimed accurately enough, to "blind" a pilot. However, these recent reckless "laser attacks" can distract pilots (and also road drivers) and I agree that this does have the potential to cause significant loss of life, so in my personal view, the restrictions are 100% justified. Last year, a helicopter carrying a critically ill brain surgery patient could not land after the pilot was targeted by a laser beam. Click here for the details of this incident. One aircraft had to even "go around" (abort landing at last minute and pull up), due to a fool with a hand held laser at the end of runway 16R at Kingsford Smith. Police have already arrested and charged people using hand held lasers in this manner. Another story about this rising crime is available by clicking here.

Despite the views of the majority of amateur astronomical groups trying to get these laws further relaxed, it is my view that the current proposed laws for the use of hand held lasers are warranted and further exceptions should not be granted. I understand that this would not be a very popular view but if hand held green lasers are used to "point out stars" (especially at star parties in large metropolitan areas) there is a greater chance of this type of use being misunderstood. It would only take one person at a star party to accidentally hit a plane on final approach, to cause the Australian Government to make a total ban on ALL use of lasers (hand held or not) outdoors for astronomical use. Use of hand held lasers also ruin astrophotos at the darker Star Parties, so why should they be permitted, if only for that reason alone? We are all fighting against light pollution, not add more, so why are organisers fighting to allow them? It simply doesn't make sense to me!

A total ban would cause significant hardship to Observatories, like Grove Creek, that use fixed installed lasers on telescopes for the sole use as viewfinders for the synchronisation of the optics with the computer mounts of the telescopes with small field of views, such those with CCD cameras. This is an essential use at Grove Creek, as most of our telescopes are now dedicated CCD imaging instruments - standard optical viewfinders are no longer accurate enough to land a star on the image detector.

The fixed Laser Viewfinders that we use on our telescopes.

As a result, these are the guidelines for the use of lasers at Grove Creek:

Staff are permitted, by law, to use the two <10mW lasers fixed-mounted on the telescopes as viewfinders, to synchronise telescope pointing. Since these lasers are not "hand held", they don't fall under the legislation anyway. However, the exception is where an aircraft is in the area and in this case, the staff member must turn off the laser immediately and wait until the aircraft has left the area. The majority of aircraft are on the western/eastern flight path to Sydney. At Grove Creek, this is around -25 declination, so this area of the sky should be avoided wherever possible, when a star align is required. This is despite that most of these aircraft are at least 4,000 metres or a higher altitude, if on the descent glide path to YSSY (Kingsford Smith Airport, Sydney) and should not be affected - planes present a very tiny target at this altitude.

Although we do have official permission to use lasers in "hand held mode", any visitor or staff member that points any laser device at any person, residence or structure, will be banned from the Observatory. Any Trunkey resident with any further concerns may click HERE to contact me.

Steven Williams,
Managing Astronomer,
Grove Creek Observatory.

Disclaimer: The current "laws" are current as of 7th July, 2008 and Grove Creek Observatory
will abide by any further restrictions as directed by Australian Law or the NSW Police Force.

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