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On Oct 27, 5:35�pm, QMCM  wrote:
> Nice to see that GREG has and uses BOWDITCH NO.9 1977. I have one with
> my name printed in gold on the cover. It was in thanks for using
> several of my articals and introducing The Franklin Piloting, The
> Graduated perpendiclar bisector, for the three point problem (Sextant)
> and asisting in other items of the Piloting section. After the editor
> 'Ernest Brown retired, PUB.9 loss most of it's sea man piloting in
> favor of the eletronics. I may want to enter NAVLIST with some of
> those history, past papers.
>
> On Oct 23, 7:33�pm, Greg Rudzinski  wrote:
>
> SMG is between a fix and Estimated position. Not to sure of actual speed.
SOA is is the speed that you intend to make.Perhaps to a rendezvous
( what you thik your ship will make. You may encluded the speed used
on a paper maneuvring board for radar vectors.
>SOG Is speed between good fixes, actual movement, SINS  or tracking ship 
speed by radar and a difinite ground target.

> > Irv,
>
> > I will quote Bowditch vol. 1 edition 1977 page 61 "The expression
> > speed of advance (SOA) is used to indicate the speed intended to be
> > made along the track, and speed over ground (SOG) the speed along the
> > path actually followed. Speed made good (SMG) is the speed along the
> > course made good." I never used the acronym SOA in my merchant days
> > but it does appear to have applications when diverting for weather,
> > rescue, or rendezvous. The terminology conflict is that the word
> > ADVANCE is used to describe two very different actions regarding ship
> > movement.
>
> > Greg
>
> > On Oct 23, 1:42�pm, "Irv Haworth"  wrote:
>
> > > Hi Greg
> > > Yes I'm familiar with the ships �"advance" , etc as posted in the bridge.
> > > Unfortunately I �do not understand your last sentence. ( To me SOA means on
> > > a normal DR plot , the intended speed required...whereas SMG is the actual
> > > speed achieved from point A to B ) Given this I need another few words to
> > > clarify ..."terminology conflicts". please
> > > 73
> > > Irv
>
> > > -----Original Message-----
> > > From: navlist@fer3.com [mailto:navlist@fer3.com] On Behalf
>
> > > Of Greg Rudzinski
> > > Sent: Friday, October 23, 2009 11:59 AM
> > > To: NavList
> > > Subject: [NavList 10261] Re: SOA vs SMG or SOG
>
> > > Irv,
>
> > > Advance refers to the distance a ship moves forward during a 90� turn at a
> > > specified rudder angle. Advance, transfer, and other ships characteristics
> > > are posted on the bridge as per CFRs. Using SOA in place of SMG would lead
> > > to a possible terminology conflict.
>
> > > Greg
>
> > > On Oct 20, 6:24�pm, "Irv Haworth"  wrote:
> > > > I'm somewhat perplexed over current usage of abbreviations: to wit the
> > > > old (last 25 years ?) �standard meaning of SAO (speed of advance)
> > > > versus what �I believe is the current view as presumably held by WMO
> > > > (World Metro Org. ) who supply ships with free equipment and training
> > > > to report weather..VOS (Voluntary Obs ...) What follows is an slightly
> > > > edited (name of ship etc removed by me) recent report.
> > > > The noon to noon report based on positions shows 425 NM ( my Rhumb calc.
> > > > gives 424.5 NM) which they report as a SAO of 17.7 kts.
> > > > To me the SAO should more rightly be termed the SMG (speed made good) .
> > > > I contacted the webmaster but despite being an old US Navy chap had no
> > > idea.
>
> > > > Hopefully some members might shed some light on matter for someone who
> > > > may have slipped a notch or two without realizing the new
> > > > movement....hi..hi himself aka Irvin
>
> > > > Last reported at 2009-Oct-19 12:00 UTC. Time now 2009-Oct-19 18:30 UTC.
> > > > Position
> > > >  > > > .2&lon =-179.7&radius=300> S 17�12', W 179�42'.
>
> > > > Wind from 160 at 14 knots
>
> > > > Waves 1.0 meters (3 feet), 10 second period
>
> > > > Barometer 1012.0 mb
> > > > Air temperature 25.0 � C
> > > > Dewpoint 19.1 � C
>
> > > > Notes � �date/time � � � lat � � lon � � naut. miles run � � � � SOA
> > > > wind from � � � �knots �barom. � wave height � � air temp � � � �dew
> > > > point water temp
> > > > � � � � 2009-Oct-19 12:00 � � � �S 17�12' � � � W 179�42' � � �425
> > > > 17.7 � � 160 � �14 � � � 1012.0 �1.0 � � 25.0 � �19.1
> > > > � � � � 2009-Oct-18 12:00 � � � �S 15�00' � � � W 172�42' � � �50
> > > > 16.6 � � 120 � �12 � � � 1010.2 �1.5 � � 26.0 � �21.8- Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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