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Dokuz Eylul University Maritime Faculty
NAVIGATION ENGINEERINGDEPTH OF WATERWAYS
18.11.2014
Assoc. Prof. Dr. Selcuk NAS
Recommendations for the Design of the Maritime Configuration of Ports, Approach Channels and Harbour Basins (ROM 3.1-99).
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Doç. Dr. Selçuk NAS
DEPTH OF WATER
PIANC Report N° 121. 2014 - Maritime Navigation Commission - Harbour Approach Channels Design Guidelines
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Doç. Dr. Selçuk NAS
DEPTH OF WATER
Yaklaşım kanalı derinliğ hesabı için Ligteringen (2000) formülleri kullanılacak olur ise,
d = D + T + Smax + r + m
d : İhtiyaç duyulan derinlikD : Gemi draftıT : Harita datumun üzerindeki gelgit yüksekliğiSmax : Paralel Batma (Squat) r : dalga nedeniyle düşey hareket Hs/2m : emniyet derinliği
(dip yapısı çamur için 0,3 m, kum için 0,5 m, kaya için 1,0 m.)
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
DEPTH OF WATER
Doç. Dr. Selçuk NAS
PIANC 121.2014 ROM 3.1.99
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
Doç. Dr. Selçuk NAS
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
Doç. Dr. Selçuk NAS
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
Doç. Dr. Selçuk NAS
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
Doç. Dr. Selçuk NAS
Derrett, D. R. and Barrass C. B. (1999) “Ship Stability for Masters and Mates” Revised by Dr. C. B. Barrass, Fifth Edition.Butterworth‐Heinemann, Oxford.
• Ship on even keel and CB = 0,7 – Ship is squatting with no change of trim
• Ship on even keel and CB > 0,7 – Ship is squatting and trimming to forwardt
• Ship on even keel and CB < 0,7 – Ship is squatting and trimming to aft
• Ship with existing trim to aft – Ship is squatting with trim to aft
• Ship with existing trim to forward – Ship is squatting with trim to forward
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat With CB
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Block coefficient (CB)
Takahashi H., A. Goto and M. Abe (2006) “Study on Standardsfor Main Dimensions of the Design Ship” Technical Note ofNational Institute for Land Infrastructure Management No. 309.
Gaythwaite, J. W. (2004) Design of Marine Facilities for the Berthing, Mooring, and Repair of Vessels
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
PIANC Report N° 121. 2014 - Maritime Navigation Commission - Harbour Approach Channels Design Guidelines Doç. Dr. Selçuk NAS
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Doç. Dr. Selçuk NASDerrett, D. R. and Barrass C. B. (1999) “Ship Stability for Masters and Mates” Revised by Dr. C. B. Barrass, Fifth Edition.
Butterworth‐Heinemann, Oxford.
0
0,5
1
1,5
2
2,5
1 3 5 7 9 11 13 15
150 Mt Gemi
200 Mt Gemi
250 Mt Gemi
300 Mt Gemi
350 Mt Gemi
Hız
Squa
tNAVIGATION ENGINEERINGNAVIGATION ENGINEERING
Squat Formulas
Doç. Dr. Selçuk NAS
HOMEWORK1. Fixed your working group2. Obtain data of your design ship 3. Calculate the max. squat of your design ship for the speeds of
between 5 – 25 Knots using Huuska and Derrett/Barrassformulas.
4. State the particulars of the design ship on the excel sheet5. Prepare the excel sheet for the squat formulas.6. Please draw your graphic for calculated squat and speeds of the
design ship
NAVIGATION ENGINEERINGNAVIGATION ENGINEERING